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.
Weakness
The product receives input from an upstream component that specifies attributes that are to be initialized or updated in an object, but it does not properly control modifications of attributes of the object prototype.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Express_xss_sanitizer | Express_xss_sanitizer_project | * | 1.1.3 (excluding) |
Potential Mitigations
Related Attack Patterns
- https://cwe.mitre.org/data/definitions/1.html
- https://cwe.mitre.org/data/definitions/180.html
- https://cwe.mitre.org/data/definitions/77.html
References
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4
- https://runkit.com/embed/w306l6zfm7tu
- https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/commit/3bf8aaaf4dbb1c209dcb8d87a82711a54c1ab39a
- https://github.com/AhmedAdelFahim/express-xss-sanitizer/issues/4
- https://runkit.com/embed/w306l6zfm7tu
- https://security.snyk.io/vuln/SNYK-JS-EXPRESSXSSSANITIZER-3027443