XSS in Ci4-Cms-Erp Ci4ms
CVE-2026-34561
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 within System Settings – Social Media Management. Multiple configuration fields, including Social Media and Social Media Link, accept attacker-controlled input that is stored server-side and later rendered without proper output encoding. This issue has been patched in version 0.31.0.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 4.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L.
EPSS exploit prediction
EPSS: 0.004 (26.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 26th percentile — 26.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.002 · newest: 0.004 · change: +0.001
Affected products
- Ci4-Cms-Erp Ci4ms — versions < 0.31.0.0
Weakness classification (CWE)
References
- github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-gcfj-cf7j-vwgj (Exploit, Vendor Advisory)
- github.com/ci4-cms-erp/ci4ms/releases/tag/0.31.0.0 (Release Notes)
Frequently asked questions
- What is CVE-2026-34561?
- CVE-2026-34561 is a medium-severity vulnerability in Ci4-Cms-Erp Ci4ms, classified under Cross-site Scripting. CVSS score: 4.7/10. Published 2026-04-01.
- How severe is CVE-2026-34561?
- Medium severity. CVSS v3 base score is 4.7 out of 10.