Path Traversal in Cms Made Simple
CVE-2026-5203
A vulnerability was found in CMS Made Simple up to 2.2.22. This impacts the function _copyFilesToFolder in the library modules/UserGuide/lib/class.UserGuideImporterExporter.php of the component UserGuide Module XML Import. The manipulation results in path traversal. It is possible to launch the attack remotely. The exploit has been made public and could be used. This issue has been reported early to the project. They confirmed, that "this has already been discovered and fixed for the next release."
Vulnerability class: Path Traversal (Directory Traversal)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.005 (37.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.005 · change: +0.001
Affected products
- Cms Made Simple — versions 2.2.0, 2.2.1, 2.2.2
Weakness classification (CWE)
Public proof-of-concept exploits
References
- vuldb.com/vuln/354331 (technical-description, vdb-entry)
- vuldb.com/vuln/354331/cti (signature, permissions-required)
- vuldb.com/submit/772855 (third-party-advisory)
- drive.proton.me/urls/Q0JHZ339BW (exploit)
Frequently asked questions
- What is CVE-2026-5203?
- CVE-2026-5203 is a medium-severity vulnerability in Cms Made Simple, classified under Path Traversal. CVSS score: 4.7/10. Published 2026-03-31.
- How severe is CVE-2026-5203?
- Medium severity. CVSS v3 base score is 4.7 out of 10.
- Is CVE-2026-5203 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.