CVE-2026-85601
Grav Admin before 2.0.20 Cross-Site Scripting via marked.js
- State
- Published
- Severity
- 5.1 Medium
- Published
- Sep 4, 2026
- Updated
- Sep 10, 2026
- Reserved
- Sep 4, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.1 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N | VulnCheck |
| 3.1 | 5.4 Medium | CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N | VulnCheck |
Weaknesses
- CWE-79 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Affected Products
| Product | Versions |
|---|---|
gravgetgrav |
|
References
- GitHub Security Advisory (GHSA-752r-88j4-vxm3)vendor-advisory
- VulnCheck Advisory: Grav Admin before 2.0.20 Cross-Site Scripting via marked.jsthird-party-advisory
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