What’s Vulnerable › Vulnerabilities

CVE-2026-41202: ci4ms Backup::restore is vulnerable to Zip Slip leading to RCE

• Severity: critical (CVSS 9.4 v4.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-05-07 · updated 2026-10-26
• Weakness: CWE-22

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 Backup::restore extracts user uploaded ZIP archives without validating entry names, allowing an authenticated backend user with the backup 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

• ci4-cms-erp ci4ms: before 0.31.5.0

References

• https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.5.0
• https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-xp9f-pvvc-57p4
• https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-xp9f-pvvc-57p4

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