Vulnerability in Gwolle Guestbook — CVE-2026-103481

What to do now

Update Gwolle Guestbook to 5.1.2 or later.

Affected versions

• Everything up to and including 5.1.1

The Gwolle Guestbook plugin for WordPress is vulnerable to Reflected Cross-Site Scripting via the 'permalink' parameter in all versions up to, and including, 5.1.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that execute if they can successfully trick a user into performing an action such as clicking on a link.

This description is reproduced verbatim from the public vulnerability record.

• https://codeberg.org/cyclotouriste/gwolle-gb/commit/f6e483654b56188a3fa208fd18a4f0468577a825
• https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-ajax-infinite-scroll.php#L96
• https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L21
• https://plugins.trac.wordpress.org/browser/gwolle-gb/tags/5.1.1/frontend/gb-permalink.php#L28
• https://www.wordfence.com/threat-intel/vulnerabilities/id/d8eff266-43fe-4636-b4ef-c973db7e7952?source=cve

This page is compiled automatically from public databases. Accuracy is not guaranteed; confirm against the vendor advisory before acting.