Description
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.
Published: 2026-05-11
Score: 6.9 Medium
EPSS: < 1% Very Low
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

No vendor fix or workaround currently provided.

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Tracking

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-r7fx-8g49-7hhr Grav CMS vulnerable to stored XSS via Markdown media attribute() action
History

Wed, 13 May 2026 07:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 12 May 2026 16:30:00 +0000

Type Values Removed Values Added
CPEs cpe:2.3:a:getgrav:grav:*:*:*:*:*:*:*:*
cpe:2.3:a:getgrav:grav:2.0.0:beta1:*:*:*:*:*:*
Metrics cvssV3_1

{'score': 4.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N'}


Mon, 11 May 2026 17:15:00 +0000

Type Values Removed Values Added
First Time appeared Getgrav
Getgrav grav
Vendors & Products Getgrav
Getgrav grav

Mon, 11 May 2026 15:30:00 +0000

Type Values Removed Values Added
Description 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.
Title Grav: Stored XSS via Markdown media attribute() action in Grav CMS
Weaknesses CWE-79
References
Metrics cvssV4_0

{'score': 6.9, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:P/VC:H/VI:L/VA:N/SC:H/SI:L/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-05-11T16:19:12.101Z

Reserved: 2026-04-30T16:44:48.375Z

Link: CVE-2026-42841

cve-icon Vulnrichment

Updated: 2026-05-11T16:18:48.307Z

cve-icon NVD

Status : Analyzed

Published: 2026-05-11T16:17:34.653

Modified: 2026-05-12T16:16:34.537

Link: CVE-2026-42841

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-05-11T17:00:15Z

Weaknesses