CVE-2026-34567 | 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, the application fails to properly sanitize user-controlled input when creating or editing blog posts within the Categories section. An attacker can inject a malicious JavaScript payload into the Categories content, which is then stored server-side. This stored payload is later rendered unsafely when the Categories are viewed via blog posts, without proper output encoding, leading to stored cross-site scripting (XSS). 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: 9.1CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L

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-r33w-c82v-x5v7 exploit

github.com/.../ci4ms/security/advisories/GHSA-r33w-c82v-x5v7

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

cve.org (CVE-2026-34567)

nvd.nist.gov (CVE-2026-34567)

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