CVE-2026-41203
CRITICALci4ms < 0.31.5.0 Theme Upload - Zip Slip Remote Code Execution
Title source: manualDescription
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.
References (2)
Core 2
Core References
X_Refsource_Confirm x_refsource_confirm
https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-xv3r-vr59-95rg
X_Refsource_Misc x_refsource_misc
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.5.0
Scores
CVSS v4
9.4
EPSS
0.0048
EPSS Percentile
37.7%
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
total
Details
CWE
CWE-22
Status
published
Products (2)
ci4-cms-erp/ci4ms
0 - 0.31.5.0Packagist
ci4-cms-erp/ci4ms
< 0.31.5.0
Published
May 07, 2026
Tracked Since
May 07, 2026