CVE-2026-34557

Critical

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 within group and role management functionality. Multiple input fields (three distinct group-related fields) can be injected with malicious JavaScript payloads, which are then stored server-side. These stored payloads are later rendered unsafely within privileged administrative views without proper output encoding, leading to stored cross-site scripting (XSS) within the role and permission management context. This issue has been patched in version 0.31.0.0.

SeverityCritical
CVSS9.1
Exploit probability—
ProductCi4-cms-erp Ci4ms
PublishedMar 30, 2026
First seenMar 30, 2026

How to fix

Update
  • ci4-cms-erp ci4ms0.31.0.0 or later
  • ci4-cms-erp/ci4ms0.31.0.0 or later

Affected products

ProductAffected versionsFixed in
ci4-cms-erp ci4msv < 0.31.0.00.31.0.0
ci4-cms-erp/ci4msPackagistv < 0.31.0.00.31.0.0

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