PT-2021-13765 · Unknown · Jquery-Deparam

CVE-2021-20087 · Published 2021-04-23 · Updated 2025-08-14

Positive Technologies (AI Summary)

CVSS v3.1

8.8

High

Base vector

AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Name of the Vulnerable Software and Affected Versions: jquery-deparam version 0.5.1

Description: The issue allows a malicious user to inject properties into Object.prototype through 'Prototype Pollution'. This occurs due to improperly controlled modification of object prototype attributes in jquery-deparam.

Recommendations: For jquery-deparam version 0.5.1, update to a version that fixes the 'Prototype Pollution' issue to prevent malicious users from injecting properties into Object.prototype.

Exploit

Fix

Prototype Pollution

Weakness Enumeration

CWE-1321

Related Identifiers

CVE-2021-20087

GHSA-XG68-CHX2-253G

Affected Products

Jquery-Deparam

References · 6

• 🔥 https://github.com/BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-deparam.md · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-20087 · Security Note
• https://osv.dev/vulnerability/CVE-2021-20087 · Vendor Advisory
• https://osv.dev/vulnerability/GHSA-xg68-chx2-253g · Vendor Advisory
• https://github.com/RetireJS/retire.js/blob/6da45fcb6a3425e55ee8181b2ac35168879bf086/repository/jsrepository-master.json#L824-L842 · Note
• https://t.me/cveNotify/132367 · Telegram Post