Robin Image Optimizer Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Robin Image Optimizer plugin for WordPress, specifically in versions through 2.0.2. The issue arises from inadequate input sanitization and output escaping, allowing authenticated attackers with Author-level access or higher to inject arbitrary web scripts into the 'Alternative Text' field of Media Library images. These injected scripts are executed when a user accesses the affected page.

Impact

Exploitation of this vulnerability allows for stored cross-site scripting, where injected scripts are executed in the context of the user viewing the page.

Remediation

Users are advised to update the Robin Image Optimizer plugin to version 2.0.3 or a newer patched version.