GMS-2016-24: Sanitization bypass using HTML Entities

April 18, 2016

Due to the way that marked parses input, specifically HTML entities, it’s possible to bypass marked’s content injection protection (sanitize: true) to inject a javascript: URL. This flaw exists because &#xNNanything; gets parsed to what it could and leaves the rest behind, resulting in just anything; being left.

References

github.com/chjj/marked/pull/592
github.com/chjj/marked/pull/592/commits/2cff85979be8e7a026a9aca35542c470cf5da523

Code Behaviors & Features

Detect and mitigate GMS-2016-24 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Dependency Scanning using SBOM also detects vulnerabilities from proprietary advisories that this site does not include. Learn more about Dependency Scanning using SBOM →