CVE-2026-85601: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in getgrav grav
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 v4.0
Score 5.1medium
Affected software
getgrav
grav
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-85601 is a cross-site scripting vulnerability in Grav Admin prior to version 2.0.20. The issue arises because output from marked.parse() is not properly sanitized before being injected into the DOM using Svelte's {@html} directive within the MarkdownEditor and MarkdownModal components. This flaw enables attackers to inject malicious javascript: URI schemes in plugin or theme changelogs, which execute arbitrary code in the context of authenticated admin users. Exploitation does not require prior site access but does require an authenticated admin session.
Potential Impact
Successful exploitation allows arbitrary JavaScript code execution within authenticated admin sessions. This can lead to unauthorized actions performed with admin privileges, potentially compromising site integrity and confidentiality. The vulnerability does not require prior site access but does require an authenticated admin user to be targeted.
Mitigation Recommendations
A fix is available in Grav Admin version 2.0.20 and later. Users should upgrade to version 2.0.20 or newer to remediate this vulnerability. No additional mitigation steps are indicated in the provided data.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-09-04T11:00:28.731Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a9aada3acd9273b4981da2b
Added to database: 09/04/2026, 11:38:11 UTC
Last enriched: 09/14/2026, 23:59:58 UTC
Last updated: 10/19/2026, 06:48:20 UTC
Views: 84
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