EUVD-2026-18084
GHSA-fhrf-q333-82fm
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Lifecycle Timeline
4Tags
Description
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 when creating or editing blog categories. An attacker can inject a malicious JavaScript payload into the category title field, which is then stored server-side. This stored payload is later rendered unsafely across public-facing blog category pages, administrative interfaces, and blog post views without proper output encoding, leading to stored cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.
Analysis
Stored cross-site scripting in CI4MS blog category management allows authenticated users to inject malicious JavaScript that executes across multiple application contexts including public blog pages and administrative interfaces. Affecting all versions prior to 0.31.0.0, attackers with low-privilege authenticated access can achieve scope change with high impact to confidentiality, integrity, and availability (CVSS 9.9). …
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Remediation
Within 24 hours: Inventory all CI4MS instances and document current versions. Within 7 days: Apply vendor-released patch to version 0.31.0.0 across all affected systems; test in staging environment first. …
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