CVE-2015-8351: Gwolle Guestbook Project Gwolle Guestbook

Critical severity, CVSS 9.0. EPSS: 37% chance of exploitation in the next 30 days.

PHP remote file inclusion vulnerability in the Gwolle Guestbook plugin before 1.5.4 for WordPress, when allow_url_include is enabled, allows remote authenticated users to execute arbitrary PHP code via a URL in the abspath parameter to frontend/captcha/ajaxresponse.php. NOTE: this can also be leveraged to include and execute arbitrary local files via directory traversal sequences regardless of whether allow_url_include is enabled.

Affected products

• Gwolle Guestbook Project Gwolle Guestbook: up to and including 1.5.3

Published 2017-09-11. Last modified 2026-06-17.