XSS in Ci4-Cms-Erp Ci4ms
CVE-2026-39392
CI4MS is a CodeIgniter 4-based CMS skeleton that delivers a production-ready, modular architecture with RBAC authorization and theme support. Prior to 0.31.4.0, the Pages module does not apply the html_purify validation rule to content fields during create and update operations, while the Blog module does. Page content is stored unsanitized in the database and rendered as raw HTML on the public frontend via echo $pageInfo->content. An authenticated admin with page-editing privileges can inject arbitrary JavaScript that executes in the browser of every public visitor viewing the page. This vulnerability is fixed in 0.31.4.0.
Vulnerability class: XSS (Cross-Site Scripting)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N.
EPSS exploit prediction
EPSS: 0.003 (14.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 15th percentile — 14.7% 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: 0.003 · change: +0.000
Affected products
- Ci4-Cms-Erp Ci4ms — versions < 0.31.4.0
Weakness classification (CWE)
References
- github.com/ci4-cms-erp/ci4ms/security/advisories/GHSA-fjpj-6qcq-6pw2 (Exploit, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-39392?
- CVE-2026-39392 is a medium-severity vulnerability in Ci4-Cms-Erp Ci4ms, classified under Cross-site Scripting. CVSS score: 5.5/10. Published 2026-04-08.
- How severe is CVE-2026-39392?
- Medium severity. CVSS v3 base score is 5.5 out of 10.