CVE-2026-42841

Published: Mag 11, 2026 Last Modified: Mag 11, 2026

ExploitDB:

Other exploit source:

Google Dorks:

MEDIUM 6,9

Source: [email protected]

Attack Vector: network

Attack Complexity: low

Privileges Required: high

User Interaction: passive

Confidentiality: N/A

Integrity: N/A

Availability: N/A

Description

AI Translation Available

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.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Stable

Abstraction: Base Structure: Simple

Common Consequences

Security Scopes Affected:

Access Control Confidentiality Integrity Availability

Potential Impacts:

Bypass Protection Mechanism Read Application Data Execute Unauthorized Code Or Commands

Applicable Platforms

Technologies: AI/ML, Web Based, Web Server

Likelihood of Exploit: High

View CWE Details

https://github.com/getgrav/grav/security/advisories/GHSA-r7…

https://github.com/getgrav/grav/security/advisories/GHSA-r7fx-8g49-7hhr

https://github.com/getgrav/grav/commit/5a12f9be8314682c8713…

https://github.com/getgrav/grav/commit/5a12f9be8314682c8713e569e330f11805d0a663