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 System Settings – Social Media Management. Multiple configuration fields, including Social Media and Social Media Link, accept attacker-controlled input that is stored server-side and later rendered without proper output encoding. This issue has been patched in version 0.31.0.0.

Affected: Packagist: ci4-cms-erp/ci4ms

## Summary ### **Vulnerability: Stored DOM XSS via System Settings – Social Media Management (Same-Page Attribute Breakout & Persistent Payload Injection)** - Stored Cross-site Scripting via Unsanitized Social Media Configuration Fields with Immediate Same-Page Execution

### Description The application fails to properly sanitize user-controlled input within **System Settings – Social Media Management**. Multiple configuration fields, including **Social Media** and **Social Media Link**, accept attacker-controlled input that is stored server-side and later rendered without proper output encoding.

Unlike typical stored XSS that executes on other pages (such as public-facing landing pages), this vulnerability executes directly on the same settings page. The injected payload breaks out of the input attribute context and is immediately interpreted by the browser, resulting in same-page DOM-based XSS.

This represents a different functionality and a separate vulnerability class from public-facing landing page injection.

### Affected Functionality - System Settings – Social Media Management configuration - Same-page rendering of user-controlled input fields - DOM attribute injection within form inputs - Storage and retrieval of social media configuration values

### Attack Scenario - An attacker injects a malicious JavaScript payload into one or more Social Media Management fields. - The payload breaks out of the HTML attribute context. - The application stores and re-renders th…