Advanced iFrame WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Advanced iFrame plugin for WordPress, affecting all versions through 2025.2. The issue arises from inadequate input sanitization and output escaping of user-supplied attributes in the 'advanced_iframe' shortcode. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary scripts into pages, which are executed when users access 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 Advanced iFrame plugin to version 2025.3 or a newer patched version.