ND Booking - Authentication Bypass (CVE-2019-15774)

CVE-2019-15774 is a vulnerability in the nd-booking plugin for WordPress prior to version 2.5, where an unauthenticated AJAX action allows attackers to modify the siteurl setting. This flaw could be exploited to redirect users, disrupt site functionality, or facilitate further attacks such as phishing or site takeover.

CrowdSec has been tracking this vulnerability and its exploits since 24th of September 2025.

Based on data from the CrowdSec network, nearly all observed exploitation of CVE-2019-15774 is fully opportunistic, with attackers indiscriminately scanning the entire internet. These attacks are automated and lack any form of target selection or reconnaissance. Telemetry from the CrowdSec network also shows that exploitation activity for CVE-2019-15774 remains steady week-over-week. Attack volumes are consistent with long-term trends, indicating sustained interest from threat actors. CVE-2019-15774 continues to be an active part of the threat landscape and will likely remain this way for the forseeable future.

Attackers exploit unauthenticated requests to /wp-admin/admin-ajax.php with the action=nd_booking_import_settings_php_function parameter to change plugin options without authorization.