EUVD-2026-20484
GHSA-7cm9-v848-cfh2
Severity by source
AV:N/AC:L/PR:H/UI:R/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:R/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 blacklist (ban) note parameter in UserController::ajax_blackList_post() is stored in the database without sanitization and rendered into an HTML data-note attribute without escaping. An admin with blacklist privileges can inject arbitrary JavaScript that executes in the browser of any other admin who views the user management 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 blacklist privileges to inject arbitrary JavaScript through unsanitized note parameters, which executes in the browsers of other administrators viewing the user management page. The vulnerability requires high-privilege authenticated access and user interaction (admin viewing the affected page), limiting real-world impact despite the network-accessible attack vector.
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Vulnerability AssessmentAI
| Risk Assessment | This vulnerability presents moderate real-world risk despite a CVSS score of 4.8 (medium). … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An administrator with user blacklist privileges injects a malicious JavaScript payload (e.g., fetching sensitive admin data or modifying other admin accounts) into a user's blacklist note field via the UserController::ajax_blackList_post() endpoint. The payload is stored unsanitized in the database. … |
| Remediation | Vendor-released patch: upgrade to CI4MS 0.31.4.0 or later, which includes sanitization of the blacklist note parameter before database storage and proper HTML escaping during attribute rendering. … Detailed patch versions, workarounds, and compensating controls in full report. |
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