CVE-2026-85601

Description

Grav Admin before 2.0.20 fails to sanitize output from marked.parse() before injecting it into the DOM via Svelte's {@html} directive in MarkdownEditor and MarkdownModal components. Attackers can inject javascript: URI schemes in plugin or theme changelogs to execute arbitrary code in authenticated admin sessions without requiring site access.

CVSS Vector

References

• https://github.com/getgrav/grav/security/advisories/GHSA-752r-88j4-vxm3
• https://www.vulncheck.com/advisories/grav-admin-before-2.0.20-cross-site-scripting-via-marked-js