{"id":"CVE-2021-22877","aliases":["EUVD-2021-10012","GHSA-v65r-wc6r-r9x8"],"status":"published","title":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own...","description":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.","severity":{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-11","score":0.01686,"percentile":0.77317,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"cwes":["CWE-269","CWE-284","CWE-862"],"published":"2021-03-03T17:39:15Z","modified":"2026-10-20T10:53:36Z","products":[{"vendor":"fedoraproject","product":"fedora"},{"vendor":"hackerone","product":"nextcloud server"},{"vendor":"nextcloud","product":"nextcloud_server"}],"references":[{"url":"https://hackerone.com/reports/1061591","tags":["x_refsource_MISC","x_transferred","Issue Tracking","Third Party Advisory","report"]},{"url":"https://nextcloud.com/security/advisory/?id=NC-SA-2021-004","tags":["x_refsource_MISC","x_transferred","Broken Link","Vendor Advisory","advisory"]},{"url":"https://github.com/nextcloud/server/issues/24600","tags":["x_refsource_MISC","x_transferred","Exploit","Issue Tracking","Patch","Third Party Advisory","fix"]},{"url":"https://github.com/nextcloud/server/pull/25224","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","fix"]},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/","tags":["vendor-advisory","x_refsource_FEDORA","x_transferred","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-22877"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/L6BO6P6MP2MOWA6PZRXX32PLWPXN5O4S/"},{"url":"https://github.com/advisories/GHSA-v65r-wc6r-r9x8"}],"sources":{"cve":[{"id":"CVE-2021-22877","description":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.","status":"published","published":"2021-03-03T17:39:15Z","modified":"2024-08-03T18:51:07.53Z","cwes":["CWE-284"],"updated_at":"2026-11-02T14:32:57.701381Z"}],"euvd":[{"id":"EUVD-2021-10012","description":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.","status":"published","published":"2021-03-03T17:39:15Z","modified":"2024-08-03T18:51:07Z","updated_at":"2026-11-03T03:25:01.606931Z"}],"ghsa":[{"id":"GHSA-v65r-wc6r-r9x8","title":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own...","description":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.","status":"published","published":"2022-05-24T17:43:34Z","modified":"2023-01-28T05:01:45Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"cwes":["CWE-269","CWE-862"],"updated_at":"2026-11-02T14:43:37.951512Z"}],"nvd":[{"id":"CVE-2021-22877","description":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.","status":"published","published":"2021-03-03T18:15:14.707Z","modified":"2026-06-17T03:37:55.91Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5.5,"vector":"AV:N/AC:L/Au:S/C:P/I:P/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-284","CWE-862"],"updated_at":"2026-11-02T14:06:50.399901Z"}],"osv":[{"id":"CVE-2021-22877","description":"A missing user check in Nextcloud prior to 20.0.6 inadvertently populates a user's own credentials for other users external storage configuration when not already configured yet.","status":"published","published":"2021-03-03T18:15:14.707Z","modified":"2026-10-20T10:53:36.467005683Z","cvss":[{"version":"3.1","score":6.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:18.367807Z"}]}}