EUVD-2026-32036
GHSA-599f-5f93-g6j8
CVSS VectorNVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Lifecycle Timeline
2DescriptionNVD
The Appointment Booking Calendar - Simply Schedule Appointments Booking Plugin plugin for WordPress is vulnerable to denial of service in all versions up to, and including, 1.6.11.5. This is due to a publicly accessible REST API endpoint (/wp-json/ssa/v1/async) that calls PHP's sleep() function on a user-supplied delay parameter without any rate limiting. This makes it possible for unauthenticated attackers to exhaust PHP worker processes, denying access to the site to legitimate users.
AnalysisAI
Uncontrolled resource consumption in the Simply Schedule Appointments WordPress plugin (all versions ≤ 1.6.11.5) enables unauthenticated remote attackers to exhaust PHP-FPM or mod_php worker processes, effectively rendering the WordPress site unavailable to legitimate users. The attack surface is a publicly accessible REST endpoint (/wp-json/ssa/v1/async) that directly passes a caller-controlled delay parameter into PHP's native sleep() function with no rate limiting or input sanitization. …
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