RCE in Cms Made Simple
CVE-2026-4225
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.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 2.4 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:N/I:L/A:N.
EPSS exploit prediction
EPSS: 0.004 (26.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- Cms Made Simple — versions 2.2.0, 2.2.1, 2.2.2
Weakness classification (CWE)
References
- vuldb.com/ (technical-description, vdb-entry)
- vuldb.com/ (signature, permissions-required)
- vuldb.com/ (third-party-advisory)
- github.com/feixuezhi/cms/wiki (exploit)
Frequently asked questions
- What is CVE-2026-4225?
- CVE-2026-4225 is a low-severity vulnerability in Cms Made Simple, classified under Cross-site Scripting. CVSS score: 2.4/10. Published 2026-03-16.
- How severe is CVE-2026-4225?
- Low severity. CVSS v3 base score is 2.4 out of 10.