CVE-2021-27671: Cross site scripting in comrak

August 25, 2021 (updated March 22, 2023)

An issue was discovered in the comrak crate before 0.9.1 for Rust. Cross site scripting (XSS) can occur because the protection mechanism for data: and javascript: URIs is case-sensitive, allowing (for example) Data: to be used in an attack.

References

github.com/advisories/GHSA-xmr7-v725-2jjr
github.com/kivikakk/comrak
github.com/kivikakk/comrak/commit/b3efbb6e427bcd33bb14db45753ad4fd98e0f5bf
github.com/kivikakk/comrak/releases/tag/0.9.1
nvd.nist.gov/vuln/detail/CVE-2021-27671
rustsec.org/advisories/RUSTSEC-2021-0026.html

Detect and mitigate CVE-2021-27671 with GitLab Dependency Scanning

Secure your software supply chain by verifying that all open source dependencies used in your projects contain no disclosed vulnerabilities. Learn more about Dependency Scanning →