CVE-2026-34571 | THREATINT

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 0.31.0.0, a Stored Cross-Site Scripting (Stored XSS) vulnerability exists in the backend user management functionality. The application fails to properly sanitize user-controlled input before rendering it in the administrative interface, allowing attackers to inject persistent JavaScript code. This results in automatic execution whenever backend users access the affected page, enabling session hijacking, privilege escalation, and full administrative account compromise. This issue has been patched in version 0.31.0.0.

PUBLISHED Reserved 2026-03-30 | Published 2026-04-01 | Updated 2026-04-02 | Assigner GitHub_M

CRITICAL: 10.0CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Problem types

CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')

Product status

< 0.31.0.0

affected

References

github.com/.../ci4ms/security/advisories/GHSA-fc4p-p49v-r948 exploit

github.com/.../ci4ms/security/advisories/GHSA-fc4p-p49v-r948

github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0

cve.org (CVE-2026-34571)

nvd.nist.gov (CVE-2026-34571)

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