Cyber Resilience

CVE-2022-21169

HighPublic PoC

Published: 26 September 2022

Published
26 September 2022
Modified
21 May 2025
KEV Added
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Patch
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CVSS Score v3.1 7.3 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
EPSS Score 0.0050 66.6th percentile
Risk Priority 15 60% EPSS · 20% KEV · 20% CVSS

Summary

CVE-2022-21169 is a high-severity Prototype Pollution (CWE-1321) vulnerability in Express Xss Sanitizer Project Express Xss Sanitizer. Its CVSS base score is 7.3 (High).

Operationally, ranked in the top 33.4% of CVEs by exploit likelihood; it is not currently listed in the CISA KEV catalog; a public proof-of-concept is referenced.

EU & UK References

Vulnerability details

The package express-xss-sanitizer before 1.1.3 are vulnerable to Prototype Pollution via the allowedTags attribute, allowing the attacker to bypass xss sanitization.

CWE(s)
CWE-1321

Related Threats

No named actor attribution yet. ATT&CK technique mapping in progress for this CVE.

Affected Assets

express xss sanitizer project
express xss sanitizer
≤ 1.1.3

Mitigating Controls

No mitigating controls mapped yet. The per-CVE control annotator has not reached this CVE.

References