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CVE-2021-20086

41
FAUCET Score

CVE-2021-20086 is a high-severity prototype pollution vulnerability affecting jquery-bbq versions 1.2.1 and earlier, allowing attackers to inject properties into Object.prototype. This flaw carries a CVSS score of 8.8, indicating a high risk of compromise with low attack complexity and the potential for complete confidentiality, integrity, and availability impact. While there is no evidence of active exploitation in the wild or public Metasploit/ExploitDB modules, a Nuclei template exists for a related Odoo Apps XSS vulnerability, and the CVE has received minimal community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
1.2.1CPE matchmatch criteria
cpe:2.3:a:jquery-bbq_project:jquery-bbq:1.2.1:*:*:*:*:*:*:*

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
6.10%
Probability of exploitation in next 30 days
EPSS Percentile
92.7%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
Nuclei: CVE-2021-20086 · Oct 8, 2025
This CVE's current EPSS score of 0.0610 is in the 92nd percentile among its peer group of 17,844 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-7w8j-85wm-6xfqhigh

Prototype Pollution in jquery-bbq

May 24, 2021

References

security.netapp.com / advisory/ntap-20241108-0002
github.com / BlackFan/client-side-prototype-pollution/blob/master/pp/jquery-bbq.md
ExploitThird Party Advisory