Alert Box Block WordPress Plugin Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Alert Box Block WordPress plugin, specifically in versions through 1.1.3. The issue arises from inadequate input sanitization and output escaping of user-supplied attributes in the Alert Box block. This vulnerability allows authenticated attackers with contributor-level access or higher to inject arbitrary web 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 Alert Box Block plugin to version 1.1.4 or later.