{"id":"CVE-2026-52839","state":"PUBLISHED","title":"Easy!Appointments appointments/store and appointments/update allow cross-provider appointment injection — Authorization Bypass","description":"Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 correctly filter provider-scoped appointments in the `appointments/search` response, proving that provider isolation is an intended security boundary. However, the direct mutation endpoints `appointments/store` and `appointments/update` only check generic appointment privileges and never verify that the submitted `id_users_provider` belongs to the current session. A normal authenticated provider can inject new appointments into another provider's schedule via `store`, or reassign existing appointments into a foreign provider's calendar via `update`. The `store` path contains an additional write-before-crash bug: the unauthorized row is committed to the database before the controller crashes on a type error, so the attacker receives an error response while the foreign appointment is already persisted. Version 1.6.0 patches the issue.","publishedAt":"2026-07-14T15:21:23.199Z","updatedAt":"2026-07-29T16:25:59.689Z","severity":{"score":3.3,"label":"Low","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N","source":"GitHub_M"},"assigner":"GitHub_M","products":["alextselegidis easyappointments"],"affected":[{"vendor":"alextselegidis","product":"easyappointments","versions":[{"version":"< 1.6.0","status":"affected"}]}],"references":["https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-w8xc-8g92-v77h","https://github.com/alextselegidis/easyappointments/commit/725eafa647308846ce887657db12771a829e42ef"],"weaknesses":["CWE-639","CWE-862"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52839.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52839","state":"PUBLISHED","datePublished":"2026-07-14T15:21:23.199Z","dateUpdated":"2026-07-29T16:25:59.689Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T18:41:27.724Z"},"containers":{"cna":{"title":"Easy!Appointments appointments/store and appointments/update allow cross-provider appointment injection — Authorization Bypass","descriptions":[{"lang":"en","value":"Easy!Appointments is a self hosted appointment scheduler. Versions prior to 1.6.0 correctly filter provider-scoped appointments in the `appointments/search` response, proving that provider isolation is an intended security boundary. However, the direct mutation endpoints `appointments/store` and `appointments/update` only check generic appointment privileges and never verify that the submitted `id_users_provider` belongs to the current session. A normal authenticated provider can inject new appointments into another provider's schedule via `store`, or reassign existing appointments into a foreign provider's calendar via `update`. The `store` path contains an additional write-before-crash bug: the unauthorized row is committed to the database before the controller crashes on a type error, so the attacker receives an error response while the foreign appointment is already persisted. Version 1.6.0 patches the issue."}],"affected":[{"vendor":"alextselegidis","product":"easyappointments","versions":[{"version":"< 1.6.0","status":"affected"}]}],"references":[{"url":"https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-w8xc-8g92-v77h","name":"https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-w8xc-8g92-v77h","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/alextselegidis/easyappointments/commit/725eafa647308846ce887657db12771a829e42ef","name":"https://github.com/alextselegidis/easyappointments/commit/725eafa647308846ce887657db12771a829e42ef","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":3.3,"baseSeverity":"LOW","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"HIGH","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:L/I:L/A:N","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-862","lang":"en","description":"CWE-862: Missing Authorization","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-29T16:25:59.689Z"},"source":{"advisory":"GHSA-w8xc-8g92-v77h","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/alextselegidis/easyappointments/security/advisories/GHSA-w8xc-8g92-v77h","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-15T14:48:44.724792Z","id":"CVE-2026-52839","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-15T14:51:02.293Z"}}]}}}