CVE Catalog

CVE-2026-103481

MediumCVSS 6.1
Published: Translated: NVD NIST

Summary

The Gwolle Guestbook plugin for WordPress (versions up to and including 5.1.1) is vulnerable to Reflected Cross-Site Scripting via the 'permalink' parameter due to insufficient input sanitization and output escaping. An unauthenticated attacker can inject arbitrary web scripts that execute if a user is tricked into clicking a crafted link.

Risk Assessment

An attacker can execute arbitrary JavaScript in the victim's browser, potentially leading to session theft or other actions in the context of a logged-in user.

Recommendation

Update the Gwolle Guestbook plugin to a version later than 5.1.1, and avoid clicking untrusted links to this plugin until the update is applied.

Related vulnerabilities

Original NVD description (English source)

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.

Vulnerability data from NVD (NIST) · CISA KEV · EPSS