CVE-2022-21169

Prototype Pollution

State: Published
Severity: 7.3 High
Published: Sep 26, 2022
Updated: May 21, 2025
Reserved: Feb 24, 2022

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.3 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P	snyk

Weaknesses

CWE-1321 Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

Affected Products

Product	Versions
express-xss-sanitizern/a	before 1.1.3Affected

References

https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443
https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4
https://runkit.com/embed/w306l6zfm7tu
https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a

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