CVE-2021-20087

Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution') in jquery-deparam 0.5.1 allows a malicious user to inject properties into Object.prototype.

CVSS v3 8.8 HIGH
CVSS v2.0 6.5 MEDIUM

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

6.5^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:P/I:P/A:P

Exploitability : 8.0 / Impact : 6.4

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact PARTIAL

Integrity Impact PARTIAL

Availability Impact PARTIAL

References

Link	Resource
https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md	Exploit Third Party Advisory
https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md	Exploit Third Party Advisory
https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842

Configurations

Configuration 1 (hide)

cpe:2.3:a:acemetrix:jquery-deparam:0.5.1:*:*:*:*:*:*:*

History

14 Aug 2025, 21:15

Type	Values Removed	Values Added
References		() https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842 -

21 Nov 2024, 05:45

Type	Values Removed	Values Added
References	~~() https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md - Exploit, Third Party Advisory~~	() https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md - Exploit, Third Party Advisory

08 Aug 2023, 14:22

Type	Values Removed	Values Added
CWE	~~NVD-CWE-Other~~	CWE-1321

Information

Published : 2021-04-23 18:15

Updated : 2025-08-14 21:15

NVD link : CVE-2021-20087

Mitre link : CVE-2021-20087

CVE.ORG link : CVE-2021-20087

JSON object : View

Products Affected

acemetrix

jquery-deparam

CWE

CWE-1321

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

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