GitHub Advisoryadvisory · Packagist

GHSA-w9qg-chfh-g3q9 Concrete CMS has a stored Cross-site Scripting (XSS) vulnerability

MEDIUM Published 2026-03-04 Modified 2026-03-04 Official page ↗
Aliases
CVE-2026-3242
Ecosystem
Packagist
Packages
concrete5/concrete5
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N
Weaknesses
CWE-79
Reviewed
2026-03-04

Affected packages

• Packagist concrete5/concrete5: < 9.4.8 → fixed in 9.4.8

Description

In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block.   The Concrete CMS security team gave thanks M3dium for reporting.

Related

Alias · CVE (1)

  • CVE-2026-3242 In Concrete CMS below version 9.4.8, a rogue administrator can add stored XSS via the Switch Language block. vulnerability

Weakness · CWE (1)

  • CWE-79 Improper Neutralization of Input During Web Page Generation weakness

References