CWE-1321
AllowedImproperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Abstraction: Variant · Status: Incomplete
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.
811 vulnerabilities reference this CWE, most recent first.
CVE-2023-2972 (GCVE-0-2023-2972)
Vulnerability from cvelistv5 – Published: 2023-05-30 00:00 – Updated: 2025-01-10 18:53- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
| Vendor | Product | Version | |
|---|---|---|---|
| antfu | antfu/utils |
Affected:
unspecified , < 0.7.3
(custom)
|
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CVE-2023-1717 (GCVE-0-2023-1717)
Vulnerability from cvelistv5 – Published: 2023-11-01 09:03 – Updated: 2024-09-05 19:45| URL | Tags |
|---|---|
| https://starlabs.sg/advisories/23/23-1717/ | third-party-advisory |
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CVE-2023-0163 (GCVE-0-2023-0163)
Vulnerability from cvelistv5 – Published: 2024-11-26 11:36 – Updated: 2024-11-27 16:02- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
| URL | Tags |
|---|---|
| https://github.com/mozilla/node-convict/issues/410 | issue-tracking |
| https://github.com/mozilla/node-convict/security/… | vendor-advisory |
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CVE-2022-46175 (GCVE-0-2022-46175)
Vulnerability from cvelistv5 – Published: 2022-12-24 00:00 – Updated: 2024-08-03 14:24- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
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CVE-2022-41879 (GCVE-0-2022-41879)
Vulnerability from cvelistv5 – Published: 2022-11-10 00:00 – Updated: 2025-04-23 16:38- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
| Vendor | Product | Version | |
|---|---|---|---|
| parse-community | parse-server |
Affected:
< 4.10.20
Affected: >= 5.0.0, < 5.3.3 |
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CVE-2022-41878 (GCVE-0-2022-41878)
Vulnerability from cvelistv5 – Published: 2022-11-10 00:00 – Updated: 2025-04-23 16:38| Vendor | Product | Version | |
|---|---|---|---|
| parse-community | parse-server |
Affected:
< 4.10.19
|
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CVE-2022-39396 (GCVE-0-2022-39396)
Vulnerability from cvelistv5 – Published: 2022-11-10 00:00 – Updated: 2025-04-23 16:38- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
| Vendor | Product | Version | |
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| parse-community | parse-server |
Affected:
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Affected: >= 5.0.0, < 5.3.1 |
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CVE-2022-39357 (GCVE-0-2022-39357)
Vulnerability from cvelistv5 – Published: 2022-10-26 00:00 – Updated: 2025-04-23 16:43- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
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CVE-2022-36060 (GCVE-0-2022-36060)
Vulnerability from cvelistv5 – Published: 2023-03-28 20:37 – Updated: 2025-02-18 19:56- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
| URL | Tags |
|---|---|
| https://github.com/matrix-org/matrix-react-sdk/se… | x_refsource_CONFIRM |
| Vendor | Product | Version | |
|---|---|---|---|
| matrix-org | matrix-react-sdk |
Affected:
< 3.53.0
|
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CVE-2022-36059 (GCVE-0-2022-36059)
Vulnerability from cvelistv5 – Published: 2023-03-28 20:32 – Updated: 2025-02-18 20:05- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
| URL | Tags |
|---|---|
| https://github.com/matrix-org/matrix-js-sdk/secur… | x_refsource_CONFIRM |
| Vendor | Product | Version | |
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| matrix-org | matrix-js-sdk |
Affected:
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{
"product": "matrix-js-sdk",
"vendor": "matrix-org",
"versions": [
{
"status": "affected",
"version": "\u003c 19.4.0"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "matrix-js-sdk is a Matrix messaging protocol Client-Server SDK for JavaScript. In versions prior to 19.4.0 events sent with special strings in key places can temporarily disrupt or impede the matrix-js-sdk from functioning properly, potentially impacting the consumer\u0027s ability to process data safely. Note that the matrix-js-sdk can appear to be operating normally but be excluding or corrupting runtime data presented to the consumer. This issue has been fixed in matrix-js-sdk 19.4.0 and users are advised to upgrade. Users unable to upgrade may mitigate this issue by redacting applicable events, waiting for the sync processor to store data, and restarting the client. Alternatively, redacting the applicable events and clearing all storage will often fix most perceived issues. In some cases, no workarounds are possible."
}
],
"metrics": [
{
"cvssV3_1": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 8.2,
"baseSeverity": "HIGH",
"confidentialityImpact": "NONE",
"integrityImpact": "LOW",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H",
"version": "3.1"
}
}
],
"problemTypes": [
{
"descriptions": [
{
"cweId": "CWE-1321",
"description": "CWE-1321: Improperly Controlled Modification of Object Prototype Attributes (\u0027Prototype Pollution\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2023-03-28T20:32:18.422Z",
"orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"shortName": "GitHub_M"
},
"references": [
{
"name": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-rfv9-x7hh-xc32",
"tags": [
"x_refsource_CONFIRM"
],
"url": "https://github.com/matrix-org/matrix-js-sdk/security/advisories/GHSA-rfv9-x7hh-xc32"
}
],
"source": {
"advisory": "GHSA-rfv9-x7hh-xc32",
"discovery": "UNKNOWN"
},
"title": "Prototype pollution in matrix-js-sdk"
}
},
"cveMetadata": {
"assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
"assignerShortName": "GitHub_M",
"cveId": "CVE-2022-36059",
"datePublished": "2023-03-28T20:32:18.422Z",
"dateReserved": "2022-07-15T23:52:24.339Z",
"dateUpdated": "2025-02-18T20:05:37.448Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1"
}
Mitigation
By freezing the object prototype first (for example, Object.freeze(Object.prototype)), modification of the prototype becomes impossible.
Mitigation
By blocking modifications of attributes that resolve to object prototype, such as proto or prototype, this weakness can be mitigated.
Mitigation
Strategy: Input Validation
When handling untrusted objects, validating using a schema can be used.
Mitigation
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.
Mitigation
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.
CAPEC-1: Accessing Functionality Not Properly Constrained by ACLs
In applications, particularly web applications, access to functionality is mitigated by an authorization framework. This framework maps Access Control Lists (ACLs) to elements of the application's functionality; particularly URL's for web apps. In the case that the administrator failed to specify an ACL for a particular element, an attacker may be able to access it with impunity. An attacker with the ability to access functionality not properly constrained by ACLs can obtain sensitive information and possibly compromise the entire application. Such an attacker can access resources that must be available only to users at a higher privilege level, can access management sections of the application, or can run queries for data that they otherwise not supposed to.
CAPEC-180: Exploiting Incorrectly Configured Access Control Security Levels
An attacker exploits a weakness in the configuration of access controls and is able to bypass the intended protection that these measures guard against and thereby obtain unauthorized access to the system or network. Sensitive functionality should always be protected with access controls. However configuring all but the most trivial access control systems can be very complicated and there are many opportunities for mistakes. If an attacker can learn of incorrectly configured access security settings, they may be able to exploit this in an attack.
CAPEC-77: Manipulating User-Controlled Variables
This attack targets user controlled variables (DEBUG=1, PHP Globals, and So Forth). An adversary can override variables leveraging user-supplied, untrusted query variables directly used on the application server without any data sanitization. In extreme cases, the adversary can change variables controlling the business logic of the application. For instance, in languages like PHP, a number of poorly set default configurations may allow the user to override variables.