ci4-cms-erp ci4ms up to 0.31.5.0 ZIP File public/ unrestricted upload

Summaryinfo

A vulnerability was found in ci4-cms-erp ci4ms. It has been classified as critical. This vulnerability affects unknown code of the file public/ of the component ZIP File Handler. The manipulation leads to unrestricted upload. This vulnerability is listed as CVE-2026-41587. The attack may be initiated remotely. There is no available exploit. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability, which was classified as critical, has been found in ci4-cms-erp ci4ms. This issue affects an unknown code block of the file public/ of the component ZIP File Handler. The manipulation with an unknown input leads to a unrestricted upload vulnerability. Using CWE to declare the problem leads to CWE-434. The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

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.

The advisory is shared at github.com. The identification of this vulnerability is CVE-2026-41587 since 04/21/2026. The exploitation is known to be easy. The attack may be initiated remotely. Additional levels of successful authentication are necessary for exploitation. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1608.002 for this issue.

Upgrading to version 0.31.7.0 eliminates this vulnerability. Applying the patch b969465e71eacd9eb57014ad1fce1fc34fa7bca0 is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Content Management System

Vendor

• ci4-cms-erp

Name

• ci4ms

Version

• 0.28.5.0
• 0.31.0.0
• 0.31.2.0
• 0.31.4.0
• 0.31.5.0

License

• open-source

Website

• Product: https://github.com/ci4-cms-erp/ci4ms/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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