XSS in Ci4-Cms-Erp Ci4ms
CVE-2026-34989
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 31.0.0.0, the application fails to properly sanitize user-controlled input when users update their profile name (e.g., full name / username). An attacker can inject a malicious JavaScript payload into their profile name, which is then stored server-side. This stored payload is later rendered unsafely in multiple application views without proper output encoding, leading to stored cross-site scripting (XSS). This vulnerability is fixed in 31.0.0.0.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.003 (21.9th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 9.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:H.
Affected products
- Ci4-cms-erp Ci4ms — versions < 31.0.0.0
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-34989?
- CVE-2026-34989 is a critical-severity vulnerability in Ci4-Cms-Erp Ci4ms, classified under Cross-site Scripting. CVSS score: 9.0/10. Published 2026-04-06.
- How severe is CVE-2026-34989?
- Critical severity. CVSS v3 base score is 9.0 out of 10.