{"id":"CVE-2026-86841","title":"The Online Scheduling and Appointment Booking System  WordPress plugin before 28.3 does not prevent deserialization of untrusted input and does not correctly restrict a privileged maintenance feature to administrators, allowing users gra…","summary":"The Online Scheduling and Appointment Booking System  WordPress plugin before 28.3 does not prevent deserialization of untrusted input and does not correctly restrict a privileged maintenance feature to administrators, allowing users gra…","severity":"medium","cvss":4.7,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:L/I:L/A:L","cwe":["CWE-502"],"product":"Online Scheduling and Appointment Booking System","affected":["online_scheduling_and_appointment_booking_system >= 23.2 < 28.3"],"published":"2026-09-27","updated":"2026-09-28","sourceUpdated":"2026-09-28T16:38:58.950","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-86841","references":[{"url":"https://wpscan.com/vulnerability/2150717e-7564-4b29-b2e7-362dd3b480c3/","label":"contact@wpscan.com"}],"tags":["nvd","cve.org"],"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-28T00:39:32.339944Z"},"ingestedAt":"2026-09-27T06:43:46.830Z","epss":0.00222,"epssPercentile":0.12759,"slug":"CVE-2026-86841","body":"## Overview\n\nThe Online Scheduling and Appointment Booking System  WordPress plugin before 28.3 does not prevent deserialization of untrusted input and does not correctly restrict a privileged maintenance feature to administrators, allowing users granted a custom booking-management capability, which an administrator must explicitly assign, to inject arbitrary PHP objects, overwrite privileged site options, and read stored integration secrets.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":25.9,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":211745,"id":"CVE-2026-86841","ts":1790560911137,"field":"cvss","old":null,"new":"4.7"},{"seq":211744,"id":"CVE-2026-86841","ts":1790560911137,"field":"severity","old":"none","new":"medium"}]}