CVE-2026-4225

CMS Made Simple User Management listusers.php cross site scripting

State: Published
Severity: 4.8 Medium
Published: Mar 16, 2026
Updated: Mar 16, 2026
Reserved: Mar 15, 2026

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.

Scores

CVSS	Score	Vector	Source
4.0	4.8 Medium	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:P	VulDB
3.1	2.4 Low	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	VulDB
3.0	2.4 Low	CVSS:3.0/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N/E:P/RL:X/RC:C	VulDB
2.0	3.3 Low	AV:N/AC:L/Au:M/C:N/I:P/A:N/E:POC/RL:ND/RC:C	VulDB

Weaknesses

CWE-79 Cross Site Scripting
CWE-94 Code Injection

Affected Products

Product	Versions
CMS Made Simplen/a	2.2.0Affected 2.2.1Affected 2.2.2Affected 2.2.3Affected 2.2.4Affected 2.2.5Affected 2.2.6Affected 2.2.7Affected 2.2.8Affected 2.2.9Affected 2.2.10Affected 2.2.11Affected 2.2.12Affected 2.2.13Affected 2.2.14Affected 2.2.15Affected 2.2.16Affected 2.2.17Affected 2.2.18Affected 2.2.19Affected 2.2.20Affected 2.2.21Affected

References

VDB-351148 | CMS Made Simple User Management listusers.php cross site scriptingvdb-entrytechnical-description
VDB-351148 | CTI Indicators (IOB, IOC, TTP, IOA)signaturepermissions-required
Submit #770530 | cms made simple 2.2.21 XSSthird-party-advisory
https://github.com/feixuezhi/cms/wikiexploit

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