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.

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 up…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (15.8th 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)

CWE-79 — Cross-site Scripting

References

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-vr2g-rhm5-q4jr (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.