Vulnerability · Published Sep 4, 2026 · Assigned by VulnCheck
CVE-2026-85601Grav Admin before 2.0.20 Cross-Site Scripting via marked.js
Medium 5.4
In plain English
A medium-severity cross-site scripting in grav from getgrav. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 21% of all known vulnerabilities).
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.3%top 79.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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.
Affected products (as reported)
Weakness: CWE-79 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
References
- GitHub Security Advisory (GHSA-752r-88j4-vxm3) vendor-advisory
- VulnCheck Advisory: Grav Admin before 2.0.20 Cross-Site Scripting via marked.js third-party-advisory