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Known vulnerabilities in Unknown Online Scheduling and Appointment Booking System

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CVE Summary Score Published
CVE-2026-86839 The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not verify that appointment… 3.8 Low Sep 27, 2026
CVE-2026-86841 The Online Scheduling and Appointment Booking System WordPress plugin before 28.3 does not prevent deserialization of… 4.7 Medium Sep 27, 2026
CVE-2026-91847 The Online Scheduling and Appointment Booking System WordPress plugin before 28.2 does not verify that the requester… 4.8 Medium Sep 19, 2026
CVE-2026-13395 The Online Scheduling and Appointment Booking System WordPress plugin before 27.8 does not sanitize or properly cast… 8.6 High Jul 30, 2026

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