CVE-2022-21169

Name: CVE-2022-21169
Creator: NVD / NIST
Published: 2022-09-26T05:15:10.133+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.72%

Last modified Jun 17, 2026

CVE-2022-21169 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.72% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.72%

49.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Express Xss Sanitizer Project	Express Xss Sanitizer	< 1.1.3

References

https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39aPatch, Third Party Advisory
https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4Exploit, Issue Tracking, Third Party Advisory
https://runkit.com/embed/w306l6zfm7tuPatch, Third Party Advisory, URL Repurposed
https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443Exploit, Third Party Advisory
https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39aPatch, Third Party Advisory
https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4Exploit, Issue Tracking, Third Party Advisory
https://runkit.com/embed/w306l6zfm7tuPatch, Third Party Advisory, URL Repurposed
https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443Exploit, Third Party Advisory

Timeline

Published: Sep 26, 2022
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2022-21169?

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.

How severe is CVE-2022-21169?

CVE-2022-21169 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.72% probability of exploitation in the next 30 days.

How do I fix CVE-2022-21169?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2022-21169?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST