GHSA-grjp-4jmr-mjcw

express-xss-sanitizer vulnerable to Prototype Pollution via allowedTags attribute

Source: GitHub Advisory Database (reviewed) Moderate CVE-2022-21169

Packages

Ecosystem	Package	Affected	Fixed in
npm	express-xss-sanitizer	< 1.1.3	1.1.3

Details

As written in the advisory (Markdown source, shown as plain text).

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

References

External links from the advisory. They lead to third-party sites.

https://nvd.nist.gov/vuln/detail/CVE-2022-21169 advisory
https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4 web
https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a web
https://github.com/AhmedAdelFahim/express-xss-sanitizer package
https://runkit.com/embed/w306l6zfm7tu web
https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443 web