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 Methods Management functionality when creating or managing application methods/pages. Multiple input fields accept attacker-controlled JavaScript payloads that are stored server-side without sanitization or output encoding. These stored values are later rendered directly into administrative interfaces and global navigation components without proper encoding, resulting in Stored DOM-Based Cross-Site Scripting (XSS). This issue has been patched in version 0.31.0.0.

Affected: Packagist: ci4-cms-erp/ci4ms

## Summary ### **Vulnerability: Stored DOM XSS via Methods Management Fields (Global Persistent Payload Execution)** - Stored Cross-Site Scripting via Unsanitized Method Creation and Management Inputs - Automatic Execution Across All Pages Where Method Is Rendered in Navigation

## Description The application fails to properly sanitize user-controlled input within the **Methods Management** functionality when creating or managing application methods/pages. Multiple input fields accept attacker-controlled JavaScript payloads that are stored server-side without sanitization or output encoding.

These stored values are later rendered directly into administrative interfaces and global navigation components without proper encoding, resulting in **Stored DOM-Based Cross-Site Scripting (XSS)**.

Critically, because created methods are automatically rendered inside the system’s navigation/menu structure, the injected payload executes globally — meaning **every page visited where the malicious method appears in the menu triggers the XSS payload automatically**.

This significantly increases severity, as exploitation is not limited to a single view — it becomes a platform-wide persistent execution point.

## Affected Functionality - Methods creation functionality - Methods management and listing functionality - Administrative navigation rendering - Permission-related UI rendering - Global sidebar / menu rendering - Storage and retrieval of method-related data…