EUVD-2026-18080
GHSA-458r-h248-29c5
Severity by source
AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L
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:L/A:L
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 within the Page Management functionality when creating or editing pages. Multiple input fields accept attacker-controlled JavaScript payloads that are stored server-side. These stored values are later rendered without proper output encoding across administrative page lists and public-facing page views, leading to stored DOM-based cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.
AnalysisAI
Stored cross-site scripting (XSS) in CI4MS page management functionality allows authenticated attackers to inject malicious JavaScript that executes in both administrative contexts and public-facing pages. Affecting CI4MS versions prior to 0.31.0.0, this vulnerability requires low-privilege authentication (PR:L) but enables scope change (S:C) with network-based remote exploitation (AV:N) and low attack complexity (AC:L). …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Requires authenticated admin or user with Page Management create/edit permissions in CI4MS versions prior to 0.31.0.0. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 9.1 (Critical) score reflects the scope change (S:C) enabling cross-privilege-boundary attacks, with high confidentiality impact (C:H) from potential session hijacking and low integrity/availability impact (I:L/A:L) from JavaScript payload constraints. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker with low-privilege authenticated access (contributor or editor role) creates a new page through the CI4MS Page Management interface, injecting a JavaScript payload into the page title field such as a session-stealing script. When an administrator accesses the page listing dashboard, the unsanitized payload executes in the admin's browser context due to lack of output encoding, capturing the administrator's session cookie and transmitting it to an attacker-controlled server. … |
| Remediation | Upgrade immediately to CI4MS version 0.31.0.0 or later, which implements proper input sanitization and output encoding for page management fields. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: Identify all CI4MS instances and document current versions (check /app/Config/Constants.php or version endpoint). …
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External POC / Exploit Code
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