Vulnerability · Published Mar 16, 2026 · Assigned by VulDB

CVE-2026-4225CMS Made Simple User Management listusers.php cross site scripting

Low 2.4

In plain English

A low-severity cross-site scripting in CMS Made Simple. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 12% of all known vulnerabilities).

Severity (CVSS 3.1)2.4Low

Exploit odds (30 days)0.2%top 88.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

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.

Affected products (as reported)

Vendor	Product	Versions
n/a	CMS Made Simple	2.2.02.2.12.2.22.2.32.2.42.2.52.2.62.2.7

Weakness: CWE-79, CWE-94 · Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C

References

VDB-351148 | CMS Made Simple User Management listusers.php cross site scripting vdb-entry, technical-description
VDB-351148 | CTI Indicators (IOB, IOC, TTP, IOA) signature, permissions-required
Submit #770530 | cms made simple 2.2.21 XSS third-party-advisory
https://github.com/feixuezhi/cms/wiki exploit