CVE-2026-4225

LOW

CMS Made Simple User Management listusers.php cross site scripting

Title source: cna
STIX 2.1

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.

References (4)

Core 4
Core References
Vdb Entry, Technical Description vdb-entry technical-description
VDB-351148 | CMS Made Simple User Management listusers.php cross site scripting
https://vuldb.com/?id.351148
Signature, Permissions Required signature permissions-required
VDB-351148 | CTI Indicators (IOB, IOC, TTP, IOA)
https://vuldb.com/?ctiid.351148
Third Party Advisory third-party-advisory
Submit #770530 | cms made simple 2.2.21 XSS
https://vuldb.com/?submit.770530

Scores

CVSS v3 2.4
EPSS 0.0021
EPSS Percentile 10.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N

CISA SSVC

Vulnrichment
Exploitation poc
Automatable no
Technical Impact partial

Details

CWE
CWE-79 CWE-94
Status published
Products (22)
n/a/CMS Made Simple 2.2.0
n/a/CMS Made Simple 2.2.1
n/a/CMS Made Simple 2.2.10
n/a/CMS Made Simple 2.2.11
n/a/CMS Made Simple 2.2.12
n/a/CMS Made Simple 2.2.13
n/a/CMS Made Simple 2.2.14
n/a/CMS Made Simple 2.2.15
n/a/CMS Made Simple 2.2.16
n/a/CMS Made Simple 2.2.17
... and 12 more
Published Mar 16, 2026
Tracked Since Mar 16, 2026