Vulnerability · Published May 7, 2026 · Assigned by GitHub_M
CVE-2026-41587CI4MS: Unrestricted PHP File Upload via Theme Installation Leads to Authenticated Remote Code Execution
High 8.6
In plain English
A high-severity unrestricted file upload in ci4ms from ci4-cms-erp. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.6% (higher than 50% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official description
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. From version 0.26.0.0 to before version 0.31.7.0, a theme upload feature allows any authenticated backend user with theme-upload permission to achieve remote code execution (RCE) by uploading a crafted ZIP file. PHP files inside the ZIP are installed into the web-accessible public/ directory with no extension or content filtering, making them directly executable via HTTP. This issue has been patched in version 0.31.7.0.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Packagist | ci4-cms-erp/ci4ms | 0.31.7.0 | GHSA-fw49-9xq4-gmx6 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| ci4-cms-erp | ci4ms | >= 0.26.0.0, < 0.31.7.0 |
Weakness: CWE-434 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N