Gwolle Guestbook Stored Cross-Site Scripting Vulnerability

A stored cross-site scripting vulnerability has been identified in the Gwolle Guestbook plugin for WordPress, affecting all versions through 4.9.2. The issue arises from inadequate input sanitization and output escaping, allowing unauthenticated attackers to inject arbitrary web scripts. These scripts are executed when users access the compromised pages.

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 can update to Gwolle Guestbook version 4.9.3 or a newer patched version to address this vulnerability.