{"id":"CVE-2017-15891","aliases":["EUVD-2017-7310","GHSA-9x4q-j758-h4gx"],"status":"published","title":"Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1...","description":"Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1-0242 allows remote authenticated users to modify calendar event via unspecified vectors.","severity":{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-08","score":0.01036,"percentile":0.64129,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-284"],"published":"2017-12-08T16:00:00Z","modified":"2026-06-17T01:08:26Z","products":[{"vendor":"synology","product":"calendar"},{"vendor":"synology","product":"synology calendar"}],"references":[{"url":"https://www.synology.com/en-global/support/security/Synology_SA_17_68_Calendar","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2017-15891"},{"url":"https://github.com/advisories/GHSA-9x4q-j758-h4gx"}],"sources":{"cve":[{"id":"CVE-2017-15891","description":"Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1-0242 allows remote authenticated users to modify calendar event via unspecified vectors.","status":"published","published":"2017-12-08T16:00:00Z","modified":"2024-09-16T20:46:59.679Z","cwes":["CWE-284"],"updated_at":"2026-11-02T14:33:14.271248Z"}],"euvd":[{"id":"EUVD-2017-7310","description":"Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1-0242 allows remote authenticated users to modify calendar event via unspecified vectors.","status":"published","published":"2017-12-08T16:00:00Z","modified":"2024-09-16T20:46:59Z","updated_at":"2026-11-03T00:55:11.287524Z"}],"ghsa":[{"id":"GHSA-9x4q-j758-h4gx","title":"Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1...","description":"Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1-0242 allows remote authenticated users to modify calendar event via unspecified vectors.","status":"published","published":"2022-05-13T01:37:32Z","modified":"2025-04-20T03:50:37Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T15:01:56.679657Z"}],"nvd":[{"id":"CVE-2017-15891","description":"Improper access control vulnerability in SYNO.Cal.EventBase in Synology Calendar before 2.0.1-0242 allows remote authenticated users to modify calendar event via unspecified vectors.","status":"published","published":"2017-12-08T16:29:00.247Z","modified":"2026-06-17T01:08:26.733Z","cvss":[{"version":"3.0","score":6.5,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":4,"vector":"AV:N/AC:L/Au:S/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-284"],"updated_at":"2026-11-02T14:04:10.156892Z"}]}}