{"id":"CVE-2020-28645","aliases":["EUVD-2020-21043","GHSA-3f4c-grv3-wwg8"],"status":"published","title":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems...","description":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions \u003c 10.6.","severity":{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-10","score":0.01255,"percentile":0.69731,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-20"],"published":"2021-02-09T18:41:01Z","modified":"2026-10-24T10:30:43Z","products":[{"vendor":"owncloud","product":"owncloud"}],"references":[{"url":"https://owncloud.com/security-advisories/missing-user-validation-leading-to-information-disclosure/","tags":["x_refsource_MISC","x_transferred","Vendor Advisory","advisory"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2020-28645"},{"url":"https://github.com/advisories/GHSA-3f4c-grv3-wwg8"}],"sources":{"cve":[{"id":"CVE-2020-28645","description":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions \u003c 10.6.","status":"published","published":"2021-02-09T18:41:01Z","modified":"2024-08-04T16:40:59.808Z","updated_at":"2026-11-02T14:35:57.017407Z"}],"euvd":[{"id":"EUVD-2020-21043","description":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions \u003c 10.6.","status":"published","published":"2021-02-09T18:41:01Z","modified":"2024-08-04T16:40:59Z","updated_at":"2026-11-03T03:07:09.169254Z"}],"ghsa":[{"id":"GHSA-3f4c-grv3-wwg8","title":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems...","description":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions \u003c 10.6.","status":"published","published":"2022-05-24T17:41:30Z","modified":"2023-01-29T05:05:38Z","cwes":["CWE-20"],"updated_at":"2026-11-02T14:45:50.403728Z"}],"nvd":[{"id":"CVE-2020-28645","description":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions \u003c 10.6.","status":"published","published":"2021-02-09T19:15:13.697Z","modified":"2026-06-17T03:10:40.69Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:N/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:06:34.188486Z"}],"osv":[{"id":"CVE-2020-28645","description":"Deleting users with certain names caused system files to be deleted. Risk is higher for systems which allow users to register themselves and have the data directory in the web root. This affects ownCloud/core versions \u003c 10.6.","status":"published","published":"2021-02-09T19:15:13.697Z","modified":"2026-10-24T10:30:43.826081556Z","cvss":[{"version":"3.1","score":9.1,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H","level":"critical"}],"updated_at":"2026-11-02T15:44:16.612899Z"}]}}