CVE-2026-3240 - Vulnerability Analysis
MediumCVSS: 4.8Last Updated: March 4, 2026
Concrete CMS - Stored XSS
Published: March 4, 2026Updated: March 4, 2026PoC AvailableRemote Exploitable
Overview
Concrete CMS < 9.4.8 contains a stored XSS caused by improper sanitization of the Question field in Legacy form elements, letting users with edit permissions perform stored XSS attacks on high-privilege accounts, exploit requires user with edit permissions.
Severity & Score
Severity: Medium
CVSS Score: 4.8
Impact
Users with edit permissions can execute scripts in high-privilege accounts, potentially leading to session hijacking or unauthorized actions.
Mitigation
Update to version 9.4.8 or later.
References
Related Resources
Details
- CVE ID
- CVE-2026-3240
- Severity
- Medium
- CVSS Score
- 4.8
- Type
- stored_xss
- Status
- confirmed
CWE
- CWE-79
CVSS Metrics
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N