{"id":"CVE-2018-8927","aliases":["EUVD-2018-20535","GHSA-pc82-888m-pq3g"],"status":"published","title":"Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows...","description":"Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) cal_id or (2) original_cal_id parameter.","severity":{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-07","score":0.00907,"percentile":0.60112,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-863"],"published":"2018-06-14T14:00:00Z","modified":"2026-06-17T02:05:40Z","products":[{"vendor":"humhub","product":"calendar"},{"vendor":"synology","product":"calendar"}],"references":[{"url":"https://www.synology.com/en-global/support/security/Synology_SA_18_16","tags":["x_refsource_CONFIRM","x_transferred","Vendor Advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2018-8927"},{"url":"https://github.com/advisories/GHSA-pc82-888m-pq3g"}],"sources":{"cve":[{"id":"CVE-2018-8927","description":"Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) cal_id or (2) original_cal_id parameter.","status":"published","published":"2018-06-14T14:00:00Z","modified":"2024-09-16T17:34:04.395Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"cna"}],"cwes":["CWE-863"],"updated_at":"2026-11-02T14:35:04.172099Z"}],"euvd":[{"id":"EUVD-2018-20535","description":"Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) cal_id or (2) original_cal_id parameter.","status":"published","published":"2018-06-14T14:00:00Z","modified":"2024-09-16T17:34:04Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium"}],"updated_at":"2026-11-03T00:55:41.00036Z"}],"ghsa":[{"id":"GHSA-pc82-888m-pq3g","title":"Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows...","description":"Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) cal_id or (2) original_cal_id parameter.","status":"published","published":"2022-05-13T01:10:20Z","modified":"2023-02-01T05:03:35Z","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-863"],"updated_at":"2026-11-02T14:50:05.01868Z"}],"nvd":[{"id":"CVE-2018-8927","description":"Improper authorization vulnerability in SYNO.Cal.Event in Calendar before 2.1.2-0511 allows remote authenticated users to create arbitrary events via the (1) cal_id or (2) original_cal_id parameter.","status":"published","published":"2018-06-14T14:29:00.403Z","modified":"2026-06-17T02:05:40.07Z","cvss":[{"version":"3.0","score":5.4,"vector":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","level":"medium","assessor":"secondary"},{"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-863"],"updated_at":"2026-11-02T14:04:29.837913Z"}]}}