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Critical · 9.4 CVE-2026-41203 EUVD-2026-28257GHSA-xv3r-vr59-95rg

ci4ms Theme::upload is vulnerable to Zip Slip leading to RCE

Published May 7, 2026 · Updated May 7, 2026 · Assigned by GitHub_M

Description

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 products

VendorProductAffectedFixed
ci4-cms-erp ci4ms < 0.31.5.0 —

Affected packages

EcosystemPackageAffectedFixedRecord
Packagist ci4-cms-erp/ci4ms < 0.31.5.0 0.31.5.0 GHSA-xv3r-vr59-95rg

References