Vulnerability 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 tags. An attacker can inject a malicious JavaScript payload into the tag name field, which is then stored server-side. This stored payload is later rendered unsafely across public tag pages and administrative interfaces without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.
CVSS Score
CRITICAL
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Ci4-Cms-Erp | Ci4Ms | < 0.31.0.0 |
Related Weaknesses (CWE)
References
- https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0Release Notes
- https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-4333-387x-w245ExploitVendor Advisory
- https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-4333-387x-w245ExploitVendor Advisory
FAQ
What is CVE-2026-34559?
CVE-2026-34559 is a vulnerability with a CVSS score of 9.1 (CRITICAL). 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 proper...
How severe is CVE-2026-34559?
CVE-2026-34559 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.
Is there a patch for CVE-2026-34559?
Check the references section above for vendor advisories and patch information. Affected products include: Ci4-Cms-Erp Ci4Ms.