What is CVE-2026-34571?

CVE-2026-34571 is a critical-severity vulnerability in Ci4-cms-erp Ci4ms, classified under Cross-site Scripting. CVSS score: 10.0/10. Published 2026-04-01.

How severe is CVE-2026-34571?

Critical severity. CVSS v3 base score is 10.0 out of 10.

XSS in Ci4-cms-erp Ci4ms

CVE-2026-34571

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…

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.001 (19.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 10.0 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

Affected products

Ci4-cms-erp Ci4ms — versions < 0.31.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

https://github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fc4p-p49v-r948 (x_refsource_CONFIRM)
https://github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0 (x_refsource_MISC)

Frequently asked questions

What is CVE-2026-34571?: CVE-2026-34571 is a critical-severity vulnerability in Ci4-cms-erp Ci4ms, classified under Cross-site Scripting. CVSS score: 10.0/10. Published 2026-04-01.
How severe is CVE-2026-34571?: Critical severity. CVSS v3 base score is 10.0 out of 10.