CVE-2026-75831

Description

Grav before 2.0.15 contains a stored cross-site scripting vulnerability in the audio and video media rendering through the sourceParsedownElement method. The media URL fragment is concatenated unescaped into rawHtml source elements, allowing attackers to inject arbitrary HTML and JavaScript that executes in viewers' sessions.

References

• https://github.com/getgrav/grav/commit/aba291a59cab29ddce491175791888d8d0b65e20
• https://github.com/getgrav/grav/security/advisories/GHSA-6qw9-4vv5-jr97
• https://www.vulncheck.com/advisories/grav-before-stored-xss-via-audio-video-source-url
• https://github.com/getgrav/grav/security/advisories/GHSA-6qw9-4vv5-jr97