Common Weakness Enumeration
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.
817 vulnerabilities reference this CWE, most recent first.
CVE-2021-4264 (GCVE-0-2021-4264)
Vulnerability from cvelistv5 – Published: 2022-12-21 00:00 – Updated: 2024-08-03 17:23
VLAI
EPSS
VEX
Title
LinkedIn dustjs prototype pollution
Summary
A vulnerability was found in LinkedIn dustjs up to 2.x and classified as problematic. Affected by this issue is some unknown functionality. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). The attack may be launched remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 3.0.0 is able to address this issue. The name of the patch is ddb6523832465d38c9d80189e9de60519ac307c3. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-216464.
Severity
6.3 (Medium)
6.3 (Medium)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.216464 | vdb-entry |
| https://vuldb.com/?ctiid.216464 | signaturepermissions-required |
| https://github.com/linkedin/dustjs/issues/804 | exploitissue-tracking |
| https://github.com/linkedin/dustjs/pull/805 | issue-tracking |
| https://github.com/linkedin/dustjs/commit/ddb6523… | patch |
| https://github.com/linkedin/dustjs/releases/tag/v3.0.0 | patch |
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CVE-2021-3918 (GCVE-0-2021-3918)
Vulnerability from cvelistv5 – Published: 2021-11-13 00:00 – Updated: 2025-01-17 20:02
VLAI
EPSS
VEX
Title
Prototype Pollution in kriszyp/json-schema
Summary
json-schema is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Severity
9.8 (Critical)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| kriszyp | kriszyp/json-schema |
Affected:
unspecified , ≤ 0.3.0
(custom)
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CVE-2021-3815 (GCVE-0-2021-3815)
Vulnerability from cvelistv5 – Published: 2021-12-08 16:15 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Prototype Pollution in fabiocaccamo/utils.js
Summary
utils.js is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Severity
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
2 references
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|---|---|
| https://huntr.dev/bounties/20f48c63-f078-4173-bca… | x_refsource_CONFIRM |
| https://github.com/fabiocaccamo/utils.js/commit/1… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| fabiocaccamo | fabiocaccamo/utils.js |
Affected:
unspecified , < 0.17.2
(custom)
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CVE-2021-3805 (GCVE-0-2021-3805)
Vulnerability from cvelistv5 – Published: 2021-09-17 00:00 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Prototype Pollution in mariocasciaro/object-path
Summary
object-path is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Severity
7.5 (High)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| mariocasciaro | mariocasciaro/object-path |
Affected:
unspecified , < 0.11.8
(custom)
|
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CVE-2021-3766 (GCVE-0-2021-3766)
Vulnerability from cvelistv5 – Published: 2021-09-06 11:17 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Prototype Pollution in vincit/objection.js
Summary
objection.js is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Severity
7.5 (High)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/c98e0f0e-ebf2-4072-be7… | x_refsource_CONFIRM |
| https://github.com/Vincit/objection.js/commit/46b… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| vincit | vincit/objection.js |
Affected:
unspecified , < 2.2.16
(custom)
|
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CVE-2021-3757 (GCVE-0-2021-3757)
Vulnerability from cvelistv5 – Published: 2021-09-02 12:06 – Updated: 2024-08-03 17:09
VLAI
EPSS
VEX
Title
Prototype Pollution in immerjs/immer
Summary
immer is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Severity
7.5 (High)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://github.com/immerjs/immer/commit/fa671e55e… | x_refsource_MISC |
| https://huntr.dev/bounties/23d38099-71cd-42ed-a77… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| immerjs | immerjs/immer |
Affected:
unspecified , ≤ 9.0.5
(custom)
|
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CVE-2021-3666 (GCVE-0-2021-3666)
Vulnerability from cvelistv5 – Published: 2021-09-13 17:56 – Updated: 2024-08-03 17:01
VLAI
EPSS
VEX
Title
Prototype Pollution in fiznool/body-parser-xml
Summary
body-parser-xml is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Severity
7.6 (High)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/1-other-fiznool/body-p… | x_refsource_CONFIRM |
| https://github.com/fiznool/body-parser-xml/commit… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| fiznool | fiznool/body-parser-xml |
Affected:
unspecified , < 2.0.3
(custom)
|
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CVE-2021-3645 (GCVE-0-2021-3645)
Vulnerability from cvelistv5 – Published: 2021-09-10 11:04 – Updated: 2024-08-03 17:01
VLAI
EPSS
VEX
Title
Prototype Pollution in viking04/merge
Summary
merge is vulnerable to Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Severity
6.8 (Medium)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
2 references
| URL | Tags |
|---|---|
| https://huntr.dev/bounties/ef387a9e-ca3c-4c21-80e… | x_refsource_CONFIRM |
| https://github.com/viking04/merge/commit/baba4033… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| viking04 | viking04/merge |
Affected:
unspecified , < 1.0.2
(custom)
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CVE-2020-36632 (GCVE-0-2020-36632)
Vulnerability from cvelistv5 – Published: 2022-12-25 19:37 – Updated: 2024-08-04 17:30
VLAI
EPSS
VEX
Title
hughsk flat index.js unflatten prototype pollution
Summary
A vulnerability, which was classified as critical, was found in hughsk flat up to 5.0.0. This affects the function unflatten of the file index.js. The manipulation leads to improperly controlled modification of object prototype attributes ('prototype pollution'). It is possible to initiate the attack remotely. Upgrading to version 5.0.1 is able to address this issue. The name of the patch is 20ef0ef55dfa028caddaedbcb33efbdb04d18e13. It is recommended to upgrade the affected component. The identifier VDB-216777 was assigned to this vulnerability.
Severity
6.3 (Medium)
6.3 (Medium)
CWE
- CWE-1321 - Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')
Assigner
References
6 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.216777 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.216777 | signaturepermissions-required |
| https://github.com/hughsk/flat/issues/105 | issue-tracking |
| https://github.com/hughsk/flat/pull/106 | issue-tracking |
| https://github.com/hughsk/flat/commit/20ef0ef55df… | patch |
| https://github.com/hughsk/flat/releases/tag/5.0.1 | patch |
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CVE-2011-10019 (GCVE-0-2011-10019)
Vulnerability from cvelistv5 – Published: 2025-08-13 20:53 – Updated: 2026-05-15 11:13
VLAI
EPSS
VEX
Title
Spreecommerce < 0.60.2 Search Parameter RCE
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
Assigner
References
5 references
| URL | Tags |
|---|---|
| https://raw.githubusercontent.com/rapid7/metasplo… | exploit |
| https://www.exploit-db.com/exploits/17941 | exploit |
| https://web.archive.org/web/20111009192436/http:/… | vendor-advisorypatch |
| https://www.vulncheck.com/advisories/spreecommerc… | third-party-advisory |
| https://github.com/orgs/spree | product |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Spreecommerce | Spreecommerce |
Affected:
0 , < 0.60.2
(semver)
|
Date Public
2011-10-07 00:00
Credits
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Mitigation
Implementation
By freezing the object prototype first (for example, Object.freeze(Object.prototype)), modification of the prototype becomes impossible.
Mitigation
Architecture and Design
By blocking modifications of attributes that resolve to object prototype, such as proto or prototype, this weakness can be mitigated.
Mitigation
Implementation
Strategy: Input Validation
When handling untrusted objects, validating using a schema can be used.
Mitigation
Implementation
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
Implementation
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.