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CVE-2026-4225

MEDIUM CVSS 4.0: 4.8
Updated Mar 16, 2026
PHP
Parameter Value
CVSS 4.8 (MEDIUM)
Type CWE-94 (Code Injection), CWE-79 (Cross-Site Scripting (XSS))
Vendor PHP
Public PoC No

A security flaw has been discovered in CMS Made Simple up to 2.2.21. Impacted is an unknown function of the file admin/listusers.php of the component User Management Module. Performing a manipulation of the argument Message results in cross site scripting.

The attack is possible to be carried out remotely. The exploit has been released to the public and may be used for attacks.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Attack Requirements
None
No additional conditions
Privileges Required
High
Admin privileges needed
User Interaction
Passive
Minimal interaction

Impact Assessment

Confidentiality
None
No data leak
Integrity
Low
Partial data modification
Availability
None
No disruption

CVSS Vector v4.0