CVE-2022-21169

HIGH

express-xss-sanitizer < 1.1.3 - Prototype Pollution via allowedTags Attribute

Title source: llm
STIX 2.1

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.

References (4)

Core 4
Core References
Exploit, Third Party Advisory x_refsource_misc
https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443
Exploit, Issue Tracking, Third Party Advisory x_refsource_misc
https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4
Patch, Third Party Advisory, URL Repurposed x_refsource_misc
https://runkit.com/embed/w306l6zfm7tu

Scores

CVSS v3 7.3
EPSS 0.0072
EPSS Percentile 48.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-1321
Status published
Products (2)
express_xss_sanitizer_project/express_xss_sanitizer < 1.1.3
npm/express-xss-sanitizer 0 - 1.1.3npm
Published Sep 26, 2022
Tracked Since Feb 18, 2026