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.
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Affected Vendors & Products
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History
Wed, 27 May 2026 11:15:00 +0000
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ssvc
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Wed, 27 May 2026 03:45:00 +0000
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Croixhaug
Croixhaug appointment Booking Calendar — Simply Schedule Appointments Booking Plugin Wordpress Wordpress wordpress |
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| Vendors & Products |
Croixhaug
Croixhaug appointment Booking Calendar — Simply Schedule Appointments Booking Plugin Wordpress Wordpress wordpress |
Wed, 27 May 2026 02:15:00 +0000
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| Description | 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. | |
| Title | Appointment Booking Calendar — Simply Schedule Appointments Booking Plugin <= 1.6.11.5 - Unauthenticated Denial of Service | |
| Weaknesses | CWE-400 | |
| References |
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| Metrics |
cvssV3_1
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Status: PUBLISHED
Assigner: Wordfence
Published: 2026-05-27T01:26:17.892Z
Updated: 2026-05-27T10:42:08.465Z
Reserved: 2026-04-30T12:14:44.725Z
Link: CVE-2026-7493
Updated: 2026-05-27T10:42:01.256Z
Status : Deferred
Published: 2026-05-27T02:16:34.770
Modified: 2026-05-27T14:50:47.627
Link: CVE-2026-7493
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