{"id":"CVE-2026-59234","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-59234","generatedAt":"2026-10-28T03:39:00.933Z","title":"Authorization Bypass Through User-Controlled Key (CWE-639) in CalendarDeleteEventController (app/Http/Controllers/Calendar/CalendarDeleteEventController.php), exposed at GET /calendar/event/delete/{id}, in Prospero Flow CRM before 5.5.3 allows a remote,…","description":"Authorization Bypass Through User-Controlled Key (CWE-639) in CalendarDeleteEventController (app/Http/Controllers/Calendar/CalendarDeleteEventController.php), exposed at GET /calendar/event/delete/{id}, in Prospero Flow CRM before 5.5.3 allows a remote, authenticated attacker to delete arbitrary calendar events belonging to other users by manipulating the {id} path parameter, because the delete handler resolves the record with Calendar::find($id)->delete() and performs no ownership check (no user_id/company_id scoping) before deletion. This results in unauthorized destruction of other users' calendar events across the platform.","published":"2026-07-03T13:17:30.000Z","lastModified":"2026-10-25T21:10:01.000Z","status":"Deferred","sourceIdentifier":"4daa8cea-433a-44bd-9456-53b127fc289a","cvss":{"version":"4.0","score":6.9,"severity":"MEDIUM","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M"},"cwe":["CWE-639"],"affected":[],"epss":{"score":0.00641,"percentile":0.50515,"date":"2026-10-27","history":[]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"low","text":"Lower severity and a low EPSS score (0.64%). Track it; it rarely justifies an emergency change on its own."},"changes":[],"references":[{"url":"https://github.com/Roskus/prospero-flow-crm/commit/8c26eed4d80544c30e55448e12a8e999af6d2b70","source":"4daa8cea-433a-44bd-9456-53b127fc289a"},{"url":"https://github.com/Roskus/prospero-flow-crm/releases/tag/v5.5.3","source":"4daa8cea-433a-44bd-9456-53b127fc289a"},{"url":"https://secur0.com/en/cna/cve-list/cve-2026-59234-idor-in-prospero-flow-crm-allows-deletion-of-other-users-calendar-events","source":"4daa8cea-433a-44bd-9456-53b127fc289a"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-59234","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}