CVE-2022-21169: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')

September 26, 2022 (updated February 14, 2024)

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

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

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