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. In addition, according to the CrowdSec network, attack volume against CVE-2019-15774 has dipped slightly compared to the previous week. Although still commonly targeted, the decline suggests a cooling-off period. Long-term relevance remains, but attention is waning.

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.