by Kastro
Paper/Archive/CVE-2026-41203

CVE-2026-41203

ci4-cms-erp ci4ms — ci4ms Theme::upload is vulnerable to Zip Slip leading to RCE

EPSS 0.6%public exploitCVSS 9.4
critical.is priorityof 100
48
CVSS 9.4 (CNA)9.4 / 10 × 3028.2Not in CISA KEV+300.0EPSS percentile 49.7.497 × 209.9Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to version 0.31.5.0, ci4ms Theme::upload extracts user uploaded ZIP archives without validating entry names, allowing an authenticated backend user with the theme create permission to write files to arbitrary filesystem locations (Zip Slip) and achieve remote code execution by dropping a PHP file under the public web root. This issue has been patched in version 0.31.5.0.

Affected

ProductAffectedFixed inSource
ci4ms< 0.31.5.0–CNA

Scores by source

GitHub_M (CNA)9.4CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CISA ADPSSVCExploitation: poc · Automatable: no · Technical impact: total

References

exploitgithub.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-xv3r-vr59-95rgrefgithub.com/ci4-cms-erp/ci4ms/releases/tag/0.31.5.0