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CVE-2026-34564

CRITICAL CVSS 3.1: 9.0 EPSS 0.04%
Updated Apr 07, 2026
Payload
Parameter Value
CVSS 9.0 (CRITICAL)
Affected Versions before 0.31.0.0
Fixed In 0.31.0.0
Type CWE-79 (Cross-Site Scripting (XSS))
Vendor Payload
Public PoC No

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 adding Pages to navigation menus through the Menu Management functionality. Page-related data selected via the Pages section is stored server-side and rendered without proper output encoding.

This stored payload is later rendered unsafely within administrative interfaces and public-facing navigation menus, leading to stored DOM-based cross-site scripting (XSS). This issue has been patched in version 0.31.0.0.

Attack Parameters

Attack Vector
Network
Can be exploited remotely
Attack Complexity
Low
Easy to exploit
Privileges Required
Low
Basic privileges needed
User Interaction
Required
User action required

Impact Assessment

Confidentiality
High
Complete data leak
Integrity
High
Complete data modification
Availability
High
Complete denial of service

CVSS Vector v3.1

Vulnerable Products 1

Configuration From (including) Up to (excluding)
Ci4-Cms-Erp Ci4ms
cpe:2.3:a:ci4-cms-erp:ci4ms:*:*:*:*:*:*:*:*
0.31.0.0