CVE-2026-41587 | THREATINT

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.

PUBLISHED Reserved 2026-04-21 | Published 2026-05-07 | Updated 2026-05-07 | Assigner GitHub_M

HIGH: 8.6CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Problem types

CWE-434: Unrestricted Upload of File with Dangerous Type

Product status

>= 0.26.0.0, < 0.31.7.0

affected

References

github.com/.../ci4ms/security/advisories/GHSA-fw49-9xq4-gmx6 exploit

github.com/.../ci4ms/security/advisories/GHSA-fw49-9xq4-gmx6

github.com/...ommit/b969465e71eacd9eb57014ad1fce1fc34fa7bca0

cve.org (CVE-2026-41587)

nvd.nist.gov (CVE-2026-41587)

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