CVE-2026-7493

Name of the Vulnerable Software and Affected Versions Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin versions prior to 1.6.11.6

Description The plugin for WordPress is susceptible to a denial of service. An unauthenticated attacker can exhaust PHP worker processes, preventing legitimate users from accessing the site. This occurs because the REST API endpoint "/wp-json/ssa/v1/async" invokes the PHP sleep() function using a user-supplied delay parameter without implementing rate limiting.

Recommendations Update to a version later than 1.6.11.5. As a temporary workaround, restrict access to the "/wp-json/ssa/v1/async" endpoint to minimize the risk of exploitation.