CVE-2019-10905: Code Injection

April 6, 2019 (updated August 2, 2019)

Parsedown, when safe mode is used and HTML markup is disabled, might allow attackers to execute arbitrary JavaScript code if a script (already running on the affected page) executes the contents of any element with a specific class. This occurs because spaces are permitted in code block infostrings, which interferes with the intended behavior of a single class name beginning with the language- substring.

References

github.com/erusev/parsedown/issues/699
nvd.nist.gov/vuln/detail/CVE-2019-10905

Code Behaviors & Features

Detect and mitigate CVE-2019-10905 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 →