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CVE-2021-23452

30
FAUCET Score

CVE-2021-23452 is a critical prototype pollution vulnerability affecting all versions of the 'x-assign' package. An unauthenticated attacker can remotely exploit this flaw with low complexity by manipulating the global proto object, leading to complete compromise of confidentiality, integrity, and availability. Despite its critical CVSS score of 9.8, there is currently no evidence of active exploitation, publicly available exploit code, or significant community discussion or media coverage.

Impacted Technologies

VendorProductVersion(s)CPE
All Versions ImpactedCPE matchmatch criteria
cpe:2.3:a:binaryops:x-assign:*:*:*:*:*:node.js:*:*

CVSS Data

CVSS version used by this source: 3.1

8.6HIGH

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
LOW
Availability Impact
LOW
Exploitability Score
3.9
Impact Score
4.7
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.50%
Probability of exploitation in next 30 days
EPSS Percentile
71.6%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0150 is in the 59th percentile among its peer group of 36,897 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Vendor Advisories (1)

npmGHSA-4mvj-rq4v-2fxwhigh

Prototype Pollution in x-assign

Oct 21, 2021

References

runkit.com / embed/sq8qjwemyn8t
Third Party AdvisoryURL Repurposed
snyk.io / vuln/SNYK-JS-XASSIGN-1759314
ExploitThird Party Advisory