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CVE-2021-20083

29
FAUCET Score

CVE-2021-20083 is a Prototype Pollution vulnerability affecting jquery-plugin-query-object version 2.2.3, allowing attackers to inject properties into Object.prototype. This vulnerability carries a high CVSS score of 8.8, indicating a critical risk due to its network-based attack vector, low attack complexity, and high potential for confidentiality, integrity, and availability impacts. While no active exploitation, public exploit code, or significant community discussion has been observed, its high FAUCET Risk Score of 82/100 warrants attention.

Impacted Technologies

VendorProductVersion(s)CPE
2.2.3CPE matchmatch criteria
cpe:2.3:a:jquery-plugin-query-object_project:jquery-plugin-query-object:2.2.3:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

8.8HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
4.19%
Probability of exploitation in next 30 days
EPSS Percentile
89.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0419 is in the 89th percentile among its peer group of 17,823 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.3 Bluesky, 0.1 Mastodon, and 0.2 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.1 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-q9xg-h756-8689high

jquery-plugin-query-object contains prototype pollution vulnerability

May 24, 2022

References

packetstormsecurity.com / files/166299/WordPress-Core-5.9.0-5.9.1-Cross-Site-Scripting.html
Third Party AdvisoryVDB Entry
github.com / BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-query-object.md
ExploitThird Party Advisory
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/7CR6VGITIB2TXXZ6B5QRRWPU5S4BXQPD
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/IJX6NVXSRN3RX3YUVEJQ4WUTQSDL3DSR