{"id":"CVE-2026-91847","title":"The Online Scheduling and Appointment Booking System  WordPress plugin before 28.2 does not verify that the requester owns the AI booking-assistant conversation named in its unauthenticated conversation actions, allowing any unauthentica…","summary":"The Online Scheduling and Appointment Booking System  WordPress plugin before 28.2 does not verify that the requester owns the AI booking-assistant conversation named in its unauthenticated conversation actions, allowing any unauthentica…","severity":"medium","cvss":4.8,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N","cwe":["CWE-639"],"product":"Online Scheduling and Appointment Booking System","affected":["online_scheduling_and_appointment_booking_system >= 28.1 < 28.2"],"published":"2026-09-19","updated":"2026-09-21","sourceUpdated":"2026-09-21T13:34:57.127","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-91847","references":[{"url":"https://wpscan.com/vulnerability/9eef3086-3a67-4ee2-bd78-e346e7b05d62/","label":"contact@wpscan.com"}],"tags":["nvd","cve.org"],"epss":0.00138,"epssPercentile":0.03546,"ssvc":{"exploitation":"none","automatable":"no","technicalImpact":"partial","timestamp":"2026-09-19T13:11:43.956388Z"},"ingestedAt":"2026-09-19T06:59:13.112Z","slug":"CVE-2026-91847","body":"## Overview\n\nThe Online Scheduling and Appointment Booking System  WordPress plugin before 28.2 does not verify that the requester owns the AI booking-assistant conversation named in its unauthenticated conversation actions, allowing any unauthenticated visitor to read another visitor's assistant messages and to inject messages into their in-progress conversation.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":26,"depthScoreParts":{"impact":26.4,"likelihood":0,"exploitation":0,"ransomware":0},"changes":[{"seq":207702,"id":"CVE-2026-91847","ts":1789826663654,"field":"cvss","old":null,"new":"4.8"},{"seq":207701,"id":"CVE-2026-91847","ts":1789826663654,"field":"severity","old":"none","new":"medium"}]}