{"schemaVersion":3,"id":"CVE-2026-110653","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"The Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress plugin for WordPress is vulnerable to Authentication Bypass via Race Condition in all versions up to, and including, 5.7.4. This is due to a non-atomic read-modify-write on the OTP verification attempts counter in the `verifyOTP` function: the counter is incremented using a stale in-memory value with no conditional `WHERE attempts < 10` guard on the `UPDATE` and no `SELECT ... FOR UPDATE` row lock, creating a TOCTOU window that allows concurrent requests to bypass the 10-attempt lockout. This makes it possible for unauthenticated attackers — who know a target customer's registered email address or phone number — to fire concurrent requests to the `auth__verify_otp` endpoint, defeat the lockout cap, brute-force the 6-digit OTP code, and authenticate as the targeted LatePoint customer, gaining full access to their account, bookings, and personal data. The nonce check present on the endpoint (`otp_verify_otp_nonce`) does not mitigate this issue, as the nonce is publicly emitted by the unauthenticated `request_otp` and `resend_otp` endpoints and is trivially obtainable by any unauthenticated attacker prior to launching the race.","dates":{"published":"2026-10-17T02:31:06.697Z","modified":"2026-10-18T11:22:47.841Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.1,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00403,"percentile":0.33392,"severity":"low","asOf":"2026-10-22T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-17T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00403,"percentile":0.33392}],"last30":[{"date":"2026-10-17T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00403,"percentile":null},{"date":"2026-10-22T00:00:00.000Z","score":0.00403,"percentile":0.33392}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-287","name":"Improper Authentication","description":"When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/287.html"}],"affected":[{"vendor":"latepoint","product":"appointment booking plugin – latepoint | calendar & scheduling for wordpress","name":"Appointment Booking Plugin – LatePoint | Calendar & Scheduling for WordPress","label":"appointment booking plugin – latepoint | calendar & scheduling for wordpress","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 5.7.4","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 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