CVE-2026-42841
Grav: Stored XSS via Markdown media attribute() action in Grav CMS
CVSS Score
0.0
EPSS Score
0.0%
EPSS Percentile
0th
Grav is a file-based Web platform. Prior to 2.0.0-beta.2, an authenticated user with page editing permissions can inject an executable JavaScript event-handler attribute into rendered image HTML through Grav's Markdown media action syntax. The issue is caused by Markdown image query parameters being converted into callable media actions. The public attribute() media method can be reached this way, allowing an editor to set an arbitrary HTML attribute name and value on the generated image element. This vulnerability is fixed in 2.0.0-beta.2.
| CWE | CWE-79 |
| Vendor | getgrav |
| Product | grav |
| Published | May 11, 2026 |
| Last Updated | May 11, 2026 |
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Affected Versions
getgrav / grav
< 2.0.0-beta.2