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CWE-1321

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

VariantIncompleteSimple94 CVEs
The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.

Common consequences2

  • ConfidentialityIntegrityAvailabilityRead Application DataModify Application Data

    This weakness is usually exploited by using a special attribute of objects called proto, constructor, or prototype. Such attributes give access to the object prototype. An attacker can inject attributes that are used in other components by adding or modifying attributes of an object prototype. This creates attributes that exist on every object, or replace critical attributes with malicious ones. This can be problematic if the product depends on existence or non-existence of certain attributes, or uses pre-defined attributes of the object prototype (such as hasOwnProperty, toString, or valueOf).

  • AvailabilityDoS: Crash, Exit, or Restart

    An attacker can override existing attributes with ones that have incompatible type, which may lead to a crash.

Potential mitigations5

  1. ImplementationHigh

    By freezing the object prototype first (for example, Object.freeze(Object.prototype)), modification of the prototype becomes impossible.

  2. Architecture and DesignHigh

    By blocking modifications of attributes that resolve to object prototype, such as proto or prototype, this weakness can be mitigated.

  3. ImplementationLimited

    When handling untrusted objects, validating using a schema can be used.

  4. ImplementationHigh

    By using an object without prototypes (via Object.create(null) ), adding object prototype attributes by accessing the prototype via the special attributes becomes impossible, mitigating this weakness.

  5. ImplementationModerate

    Map can be used instead of objects in most cases. If Map methods are used instead of object attributes, it is not possible to access the object prototype or modify it.

Relationships3

CVEs referencing this CWE94

CVEDescriptionSeverityEPSSFlagsModified
CVE-2019-0230

Apache Struts 2.0.0 to 2.5.20 forced double OGNL evaluation, when evaluated on raw user input in tag attributes, may lead to remote code execution.

CRITICAL9.8
97%p100
Weaponized
2024-11-21
CVE-2019-11358

jQuery before 3.4.0, as used in Drupal, Backdrop CMS, and other products, mishandles jQuery.extend(true, {}, ...) because of Object.prototype pollution. If an unsanitized source object contained an enumerable __proto__ property, it could extend the native Object.prototype.

MEDIUM6.1
87%p100
PoC
2024-11-21
CVE-2020-7774

The package y18n before 3.2.2, 4.0.1 and 5.0.5, is vulnerable to Prototype Pollution.

CRITICAL9.8
69%p99
2024-11-21
CVE-2022-24760

Parse Server is an open source http web server backend. In versions prior to 4.10.7 there is a Remote Code Execution (RCE) vulnerability in Parse Server. This vulnerability affects Parse Server in the default configuration with MongoDB. The main weakness that leads to RCE is the Prototype Pollution vulnerable code in the file `DatabaseController.js`, so it is likely to affect Postgres and any other database backend as well. This vulnerability has been confirmed on Linux (Ubuntu) and Windows. Users are advised to upgrade as soon as possible. The only known workaround is to manually patch your installation with code referenced at the source GHSA-p6h4-93qp-jhcm.

CRITICAL10.0
49%p99
PoC
2025-04-22
CVE-2022-39396

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Versions prior to 4.10.18, and prior to 5.3.1 on the 5.X branch, are vulnerable to Remote Code Execution via prototype pollution. An attacker can use this prototype pollution sink to trigger a remote code execution through the MongoDB BSON parser. This issue is patched in version 5.3.1 and in 4.10.18. There are no known workarounds.

CRITICAL9.8
41%p98
2025-04-23
CVE-2022-2564

Prototype Pollution in GitHub repository automattic/mongoose prior to 6.4.6.

CRITICAL9.8
33%p98
2024-11-21
CVE-2021-23450

All versions of package dojo are vulnerable to Prototype Pollution via the setObject function.

CRITICAL9.8
30%p98
2024-11-21
CVE-2022-1802

If an attacker was able to corrupt the methods of an Array object in JavaScript via prototype pollution, they could have achieved execution of attacker-controlled JavaScript code in a privileged context. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

HIGH8.8
27%p98
PoC
2025-04-16
CVE-2022-2200

If an object prototype was corrupted by an attacker, they would have been able to set undesired attributes on a JavaScript object, leading to privileged code execution. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

HIGH8.8
24%p98
2025-04-15
CVE-2022-21824

Due to the formatting logic of the "console.table()" function it was not safe to allow user controlled input to be passed to the "properties" parameter while simultaneously passing a plain object with at least one property as the first parameter, which could be "__proto__". The prototype pollution has very limited control, in that it only allows an empty string to be assigned to numerical keys of the object prototype.Node.js >= 12.22.9, >= 14.18.3, >= 16.13.2, and >= 17.3.1 use a null protoype for the object these properties are being assigned to.

HIGH8.2
22%p97
2025-04-30
CVE-2022-1529

An attacker could have sent a message to the parent process where the contents were used to double-index into a JavaScript object, leading to prototype pollution and ultimately attacker-controlled JavaScript executing in the privileged parent process. This vulnerability affects Firefox ESR < 91.9.1, Firefox < 100.0.2, Firefox for Android < 100.3.0, and Thunderbird < 91.9.1.

HIGH8.8
17%p97
2025-04-16
CVE-2022-24999

qs before 6.10.3, as used in Express before 4.17.3 and other products, allows attackers to cause a Node process hang for an Express application because an __ proto__ key can be used. In many typical Express use cases, an unauthenticated remote attacker can place the attack payload in the query string of the URL that is used to visit the application, such as a[__proto__]=b&a[__proto__]&a[length]=100000000. The fix was backported to qs 6.9.7, 6.8.3, 6.7.3, 6.6.1, 6.5.3, 6.4.1, 6.3.3, and 6.2.4 (and therefore Express 4.17.3, which has "deps: qs@6.9.7" in its release description, is not vulnerable).

HIGH7.5
15%p96
PoC
2025-04-29
CVE-2019-16328

In RPyC 4.1.x through 4.1.1, a remote attacker can dynamically modify object attributes to construct a remote procedure call that executes code for an RPyC service with default configuration settings.

HIGH7.5
13%p96
Functional
2024-11-21
CVE-2025-25014

A Prototype pollution vulnerability in Kibana leads to arbitrary code execution via crafted HTTP requests to machine learning and reporting endpoints.

CRITICAL9.8
13%p96
PoC
2026-02-26
CVE-2022-46175

JSON5 is an extension to the popular JSON file format that aims to be easier to write and maintain by hand (e.g. for config files). The `parse` method of the JSON5 library before and including versions 1.0.1 and 2.2.1 does not restrict parsing of keys named `__proto__`, allowing specially crafted strings to pollute the prototype of the resulting object. This vulnerability pollutes the prototype of the object returned by `JSON5.parse` and not the global Object prototype, which is the commonly understood definition of Prototype Pollution. However, polluting the prototype of a single object can have significant security impact for an application if the object is later used in trusted operations. This vulnerability could allow an attacker to set arbitrary and unexpected keys on the object returned from `JSON5.parse`. The actual impact will depend on how applications utilize the returned object and how they filter unwanted keys, but could include denial of service, cross-site scripting, elevation of privilege, and in extreme cases, remote code execution. `JSON5.parse` should restrict parsing of `__proto__` keys when parsing JSON strings to objects. As a point of reference, the `JSON.parse` method included in JavaScript ignores `__proto__` keys. Simply changing `JSON5.parse` to `JSON.parse` in the examples above mitigates this vulnerability. This vulnerability is patched in json5 versions 1.0.2, 2.2.2, and later.

HIGH8.8
9.30%p95
PoC
2024-11-21
CVE-2019-14379

SubTypeValidator.java in FasterXML jackson-databind before 2.9.9.2 mishandles default typing when ehcache is used (because of net.sf.ehcache.transaction.manager.DefaultTransactionManagerLookup), leading to remote code execution.

CRITICAL9.8
8.05%p94
2024-11-21
CVE-2026-34621

Acrobat Reader versions 24.001.30356, 26.001.21367 and earlier are affected by an Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') vulnerability that could result in arbitrary code execution in the context of the current user. Exploitation of this issue requires user interaction in that a victim must open a malicious file.

HIGH8.6
7.09%p93
KEVPoC
2026-04-14
CVE-2019-19919

Versions of handlebars prior to 4.3.0 are vulnerable to Prototype Pollution leading to Remote Code Execution. Templates may alter an Object's __proto__ and __defineGetter__ properties, which may allow an attacker to execute arbitrary code through crafted payloads.

CRITICAL9.8
7.07%p93
PoC
2025-02-12
CVE-2021-20086

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-bbq 1.2.1 allows a malicious user to inject properties into Object.prototype.

HIGH8.8
6.10%p93
2025-11-04
CVE-2020-8203

Prototype pollution attack when using _.zipObjectDeep in lodash before 4.17.20.

HIGH7.4
5.21%p91
2025-08-12
CVE-2018-19274

Passing an absolute path to a file_exists check in phpBB before 3.2.4 allows Remote Code Execution through Object Injection by employing Phar deserialization when an attacker has access to the Admin Control Panel with founder permissions.

HIGH7.2
5.20%p91
2024-11-21
CVE-2019-10744

Versions of lodash lower than 4.17.12 are vulnerable to Prototype Pollution. The function defaultsDeep could be tricked into adding or modifying properties of Object.prototype using a constructor payload.

CRITICAL9.1
5.01%p91
PoC
2025-08-12
CVE-2021-41097

aurelia-path is part of the Aurelia platform and contains utilities for path manipulation. There is a prototype pollution vulnerability in aurelia-path before version 1.1.7. The vulnerability exposes Aurelia application that uses `aurelia-path` package to parse a string. The majority of this will be Aurelia applications that employ the `aurelia-router` package. An example is this could allow an attacker to change the prototype of base object class `Object` by tricking an application to parse the following URL: `https://aurelia.io/blog/?__proto__[asdf]=asdf`. The problem is patched in version `1.1.7`.

HIGH7.5
4.92%p91
2024-11-21
CVE-2020-7746

This affects the package chart.js before 2.9.4. The options parameter is not properly sanitized when it is processed. When the options are processed, the existing options (or the defaults options) are deeply merged with provided options. However, during this operation, the keys of the object being set are not checked, leading to a prototype pollution.

CRITICAL9.8
4.68%p91
2024-11-21
CVE-2020-7699

This affects the package express-fileupload before 1.1.8. If the parseNested option is enabled, sending a corrupt HTTP request can lead to denial of service or arbitrary code execution.

CRITICAL9.8
4.67%p91
PoC
2024-11-21
CVE-2021-44906

Minimist <=1.2.5 is vulnerable to Prototype Pollution via file index.js, function setKey() (lines 69-95).

CRITICAL9.8
4.58%p90
PoC
2024-11-21
CVE-2021-23383

The package handlebars before 4.7.7 are vulnerable to Prototype Pollution when selecting certain compiling options to compile templates coming from an untrusted source.

CRITICAL9.8
4.51%p90
PoC
2025-02-12
CVE-2022-0432

Prototype Pollution in GitHub repository mastodon/mastodon prior to 3.5.0.

MEDIUM6.1
4.47%p90
2024-11-21
CVE-2018-3728

hoek node module before 4.2.0 and 5.0.x before 5.0.3 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via 'merge' and 'applyToDefaults' functions, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.

HIGH8.8
4.23%p90
2025-05-29
CVE-2021-25913

Prototype pollution vulnerability in 'set-or-get' version 1.0.0 through 1.2.10 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
4.20%p90
2024-11-21
CVE-2021-20083

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-plugin-query-object 2.2.3 allows a malicious user to inject properties into Object.prototype.

HIGH8.8
4.19%p90
2024-11-21
CVE-2020-28282

Prototype pollution vulnerability in 'getobject' version 0.1.0 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
4.03%p89
2024-11-21
CVE-2020-5258

In affected versions of dojo (NPM package), the deepCopy method is vulnerable to Prototype Pollution. Prototype Pollution refers to the ability to inject properties into existing JavaScript language construct prototypes, such as objects. An attacker manipulates these attributes to overwrite, or pollute, a JavaScript application object prototype of the base object by injecting other values. This has been patched in versions 1.12.8, 1.13.7, 1.14.6, 1.15.3 and 1.16.2

HIGH7.7
4.02%p89
2024-11-21
CVE-2020-28269

Prototype pollution vulnerability in 'field' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.99%p89
2024-11-21
CVE-2020-28273

Prototype pollution vulnerability in 'set-in' versions 1.0.0 through 2.0.0 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.88%p89
2024-11-21
CVE-2020-7743

The package mathjs before 7.5.1 are vulnerable to Prototype Pollution via the deepExtend function that runs upon configuration updates.

HIGH7.3
3.88%p89
2024-11-21
CVE-2011-10019

Spreecommerce versions prior to 0.60.2 contains a remote command execution vulnerability in its search functionality. The application fails to properly sanitize input passed via the search[send][] parameter, which is dynamically invoked using Ruby’s send method. This allows attackers to execute arbitrary shell commands on the server without authentication.

CRITICAL9.8
3.82%p89
Weaponized
2026-05-15
CVE-2018-6195

admin/partials/wp-splashing-admin-main.php in the Splashing Images plugin (wp-splashing-images) before 2.1.1 for WordPress allows authenticated (administrator, editor, or author) remote attackers to conduct PHP Object Injection attacks via crafted serialized data in the 'session' HTTP GET parameter to wp-admin/upload.php.

HIGH7.2
3.74%p88
2024-11-21
CVE-2022-21190

This affects the package convict before 6.2.3. This is a bypass of [CVE-2022-22143](https://security.snyk.io/vuln/SNYK-JS-CONVICT-2340604). The [fix](https://github.com/mozilla/node-convict/commit/3b86be087d8f14681a9c889d45da7fe3ad9cd880) introduced, relies on the startsWith method and does not prevent the vulnerability: before splitting the path, it checks if it starts with __proto__ or this.constructor.prototype. To bypass this check it's possible to prepend the dangerous paths with any string value followed by a dot, like for example foo.__proto__ or foo.this.constructor.prototype.

CRITICAL9.8
3.72%p88
2024-11-21
CVE-2021-25914

Prototype pollution vulnerability in 'object-collider' versions 1.0.0 through 1.0.3 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.70%p88
2025-04-30
CVE-2020-28270

Prototype pollution vulnerability in 'object-hierarchy-access' versions 0.2.0 through 0.32.0 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.69%p88
2024-11-21
CVE-2020-28458

All versions of package datatables.net are vulnerable to Prototype Pollution due to an incomplete fix for https://snyk.io/vuln/SNYK-JS-DATATABLESNET-598806.

HIGH7.3
3.67%p88
PoC
2024-11-21
CVE-2020-28495

This affects the package total.js before 3.4.7. The set function can be used to set a value into the object according to the path. However the keys of the path being set are not properly sanitized, leading to a prototype pollution vulnerability. The impact depends on the application. In some cases it is possible to achieve Denial of service (DoS), Remote Code Execution or Property Injection.

HIGH7.3
3.63%p88
2024-11-21
CVE-2020-7788

This affects the package ini before 1.3.6. If an attacker submits a malicious INI file to an application that parses it with ini.parse, they will pollute the prototype on the application. This can be exploited further depending on the context.

CRITICAL9.8
3.61%p88
2024-11-21
CVE-2020-28281

Prototype pollution vulnerability in 'set-object-value' versions 0.0.0 through 0.0.5 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.59%p88
2024-11-21
CVE-2021-3918

json-schema is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

CRITICAL9.8
3.56%p88
2025-01-17
CVE-2020-7768

The package grpc before 1.24.4; the package @grpc/grpc-js before 1.1.8 are vulnerable to Prototype Pollution via loadPackageDefinition.

CRITICAL9.8
3.55%p88
2024-11-21
CVE-2021-25916

Prototype pollution vulnerability in 'patchmerge' versions 1.0.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.51%p88
2025-04-30
CVE-2021-25915

Prototype pollution vulnerability in 'changeset' versions 0.0.1 through 0.2.5 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.51%p88
2025-04-30
CVE-2021-23497

This affects the package @strikeentco/set before 1.0.2. It allows an attacker to cause a denial of service and may lead to remote code execution. **Note:** This vulnerability derives from an incomplete fix in https://security.snyk.io/vuln/SNYK-JS-STRIKEENTCOSET-1038821

CRITICAL9.8
3.50%p88
2024-11-21
CVE-2021-23449

This affects the package vm2 before 3.9.4 via a Prototype Pollution attack vector, which can lead to execution of arbitrary code on the host machine.

CRITICAL10.0
3.48%p88
2024-11-21
CVE-2020-28268

Prototype pollution vulnerability in 'controlled-merge' versions 1.0.0 through 1.2.0 allows attacker to cause a denial of service and may lead to remote code execution.

HIGH7.5
3.42%p87
2024-11-21
CVE-2020-7707

The package property-expr before 2.0.3 are vulnerable to Prototype Pollution via the setter function.

CRITICAL9.8
3.38%p87
2024-11-21
CVE-2021-43138

In Async before 2.6.4 and 3.x before 3.2.2, a malicious user can obtain privileges via the mapValues() method, aka lib/internal/iterator.js createObjectIterator prototype pollution.

HIGH7.8
3.37%p87
2024-11-21
CVE-2021-25952

Prototype pollution vulnerability in ‘just-safe-set’ versions 1.0.0 through 2.2.1 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.34%p87
2024-11-21
CVE-2021-25941

Prototype pollution vulnerability in 'deep-override' versions 1.0.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.34%p87
2025-04-30
CVE-2021-25927

Prototype pollution vulnerability in 'safe-flat' versions 2.0.0 through 2.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.34%p87
2025-04-30
CVE-2021-25912

Prototype pollution vulnerability in 'dotty' versions 0.0.1 through 0.1.0 allows attackers to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.34%p87
2024-11-21
CVE-2021-25928

Prototype pollution vulnerability in 'safe-obj' versions 1.0.0 through 1.0.2 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.33%p87
2025-04-30
CVE-2021-23413

This affects the package jszip before 3.7.0. Crafting a new zip file with filenames set to Object prototype values (e.g __proto__, toString, etc) results in a returned object with a modified prototype instance.

MEDIUM5.3
3.31%p87
2024-11-21
CVE-2021-25949

Prototype pollution vulnerability in 'set-getter' version 0.1.0 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.30%p87
2024-11-21
CVE-2021-25948

Prototype pollution vulnerability in 'expand-hash' versions 0.1.0 through 1.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.30%p87
2024-11-21
CVE-2021-25946

Prototype pollution vulnerability in `nconf-toml` versions 0.0.1 through 0.0.2 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.30%p87
2024-11-21
CVE-2021-25943

Prototype pollution vulnerability in '101' versions 1.0.0 through 1.6.3 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.30%p87
2025-05-01
CVE-2020-28271

Prototype pollution vulnerability in 'deephas' versions 1.0.0 through 1.0.5 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.27%p87
2026-05-19
CVE-2020-28272

Prototype pollution vulnerability in 'keyget' versions 1.0.0 through 2.2.0 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
3.26%p87
2024-11-21
CVE-2020-7720

The package node-forge before 0.10.0 is vulnerable to Prototype Pollution via the util.setPath function. Note: Version 0.10.0 is a breaking change removing the vulnerable functions.

HIGH7.3
3.16%p86
2025-02-12
CVE-2024-21512

Versions of the package mysql2 before 3.9.8 are vulnerable to Prototype Pollution due to improper user input sanitization passed to fields and tables when using nestTables.

HIGH8.2
3.11%p86
2026-04-15
CVE-2020-8116

Prototype pollution vulnerability in dot-prop npm package versions before 4.2.1 and versions 5.x before 5.1.1 allows an attacker to add arbitrary properties to JavaScript language constructs such as objects.

HIGH7.3
3.00%p86
2025-02-12
CVE-2020-28279

Prototype pollution vulnerability in 'flattenizer' versions 0.0.5 through 1.0.5 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.98%p86
2024-11-21
CVE-2021-25953

Prototype pollution vulnerability in 'putil-merge' versions1.0.0 through 3.6.6 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.96%p85
2024-11-21
CVE-2021-25947

Prototype pollution vulnerability in 'nestie' versions 0.0.0 through 1.0.0 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.96%p85
2024-11-21
CVE-2021-25945

Prototype pollution vulnerability in 'js-extend' versions 0.0.1 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.96%p85
2024-11-21
CVE-2021-25944

Prototype pollution vulnerability in 'deep-defaults' versions 1.0.0 through 1.0.5 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.96%p85
2024-11-21
CVE-2020-28278

Prototype pollution vulnerability in 'shvl' versions 1.0.0 through 2.0.1 allows an attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.94%p85
2024-11-21
CVE-2020-28276

Prototype pollution vulnerability in 'deep-set' versions 1.0.0 through 1.0.1 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.94%p85
2024-11-21
CVE-2020-28277

Prototype pollution vulnerability in 'dset' versions 1.0.0 through 2.0.1 allows attacker to cause a denial of service and may lead to remote code execution.

CRITICAL9.8
2.94%p85
2024-11-21
CVE-2020-7708

The package irrelon-path before 4.7.0; the package @irrelon/path before 4.7.0 are vulnerable to Prototype Pollution via the set, unSet, pushVal and pullVal functions.

CRITICAL9.8
2.82%p85
2024-11-21
CVE-2020-7706

The package connie-lang before 0.1.1 are vulnerable to Prototype Pollution in the configuration language library used by connie.

CRITICAL9.8
2.80%p85
2024-11-21
CVE-2020-7719

Versions of package locutus before 2.0.12 are vulnerable to prototype Pollution via the php.strings.parse_str function.

CRITICAL9.8
2.75%p84
2024-11-21
CVE-2020-7772

This affects the package doc-path before 2.1.2.

CRITICAL9.8
2.74%p84
2024-11-21
CVE-2021-23555

The package vm2 before 3.9.6 are vulnerable to Sandbox Bypass via direct access to host error objects generated by node internals during generation of a stacktraces, which can lead to execution of arbitrary code on the host machine.

CRITICAL9.8
2.72%p84
2024-11-21
CVE-2020-7704

The package linux-cmdline before 1.0.1 are vulnerable to Prototype Pollution via the constructor.

CRITICAL9.8
2.70%p84
2024-11-21
CVE-2023-36475

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 5.5.2 and 6.2.1, an attacker can use a prototype pollution sink to trigger a remote code execution through the MongoDB BSON parser. A patch is available in versions 5.5.2 and 6.2.1.

CRITICAL9.8
2.68%p84
2024-11-27
CVE-2021-23807

This affects the package jsonpointer before 5.0.0. A type confusion vulnerability can lead to a bypass of a previous Prototype Pollution fix when the pointer components are arrays.

CRITICAL9.8
2.61%p83
2025-03-05
CVE-2022-37601

Prototype pollution vulnerability in function parseQuery in parseQuery.js in webpack loader-utils via the name variable in parseQuery.js. This affects all versions prior to 1.4.1 and 2.0.3.

CRITICAL9.8
2.60%p83
2024-11-21
CVE-2019-10747

set-value is vulnerable to Prototype Pollution in versions lower than 3.0.1. The function mixin-deep could be tricked into adding or modifying properties of Object.prototype using any of the constructor, prototype and _proto_ payloads.

CRITICAL9.8
2.43%p82
2024-11-21
CVE-2018-3721

lodash node module before 4.17.5 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability via defaultsDeep, merge, and mergeWith functions, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.

MEDIUM6.5
2.41%p82
2025-08-12
CVE-2022-22912

Prototype pollution vulnerability via .parse() in Plist before v3.0.4 allows attackers to cause a Denial of Service (DoS) and may lead to remote code execution.

CRITICAL9.8
2.39%p82
2024-11-21
CVE-2022-23631

superjson is a program to allow JavaScript expressions to be serialized to a superset of JSON. In versions prior to 1.8.1 superjson allows input to run arbitrary code on any server using superjson input without prior authentication or knowledge. The only requirement is that the server implements at least one endpoint which uses superjson during request processing. This has been patched in superjson 1.8.1. Users are advised to update. There are no known workarounds for this issue.

CRITICAL9.8
2.32%p81
2026-02-24
CVE-2020-15366

An issue was discovered in ajv.validate() in Ajv (aka Another JSON Schema Validator) 6.12.2. A carefully crafted JSON schema could be provided that allows execution of other code by prototype pollution. (While untrusted schemas are recommended against, the worst case of an untrusted schema should be a denial of service, not execution of code.)

MEDIUM5.6
2.31%p81
2024-11-21
CVE-2021-23440

This affects the package set-value before <2.0.1, >=3.0.0 <4.0.1. A type confusion vulnerability can lead to a bypass of CVE-2019-10747 when the user-provided keys used in the path parameter are arrays.

CRITICAL9.8
2.29%p81
2024-11-21
CVE-2021-32811

Zope is an open-source web application server. Zope versions prior to versions 4.6.3 and 5.3 have a remote code execution security issue. In order to be affected, one must use Python 3 for one's Zope deployment, run Zope 4 below version 4.6.3 or Zope 5 below version 5.3, and have the optional `Products.PythonScripts` add-on package installed. By default, one must have the admin-level Zope "Manager" role to add or edit Script (Python) objects through the web. Only sites that allow untrusted users to add/edit these scripts through the web are at risk. Zope releases 4.6.3 and 5.3 are not vulnerable. As a workaround, a site administrator can restrict adding/editing Script (Python) objects through the web using the standard Zope user/role permission mechanisms. Untrusted users should not be assigned the Zope Manager role and adding/editing these scripts through the web should be restricted to trusted users only. This is the default configuration in Zope.

HIGH7.2
2.28%p81
2024-11-21
CVE-2021-23460

The package min-dash before 3.8.1 are vulnerable to Prototype Pollution via the set method due to missing enforcement of key types.

HIGH7.5
2.25%p81
2025-07-18