{"id":"CVE-2021-41166","aliases":["BIT-nextcloud-2021-41166","EUVD-2021-28274","GHSA-wrwg-jwpg-r3c4"],"status":"published","title":"Permission bypass in Nextcloud Android App","description":"The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.","severity":{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00948,"percentile":0.61665,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-276"],"published":"2022-01-26T22:35:10Z","modified":"2026-10-24T10:51:25Z","fixes":[{"ecosystem":"Bitnami","package":"nextcloud","fixed_in":["3.17.1"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"nextcloud","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"3.17.1"}]}]}],"products":[{"vendor":"kiteworks","product":"security-advisories"},{"vendor":"nextcloud","product":"nextcloud"},{"vendor":"nextcloud","product":"security-advisories"}],"references":[{"url":"https://hackerone.com/reports/1358597","tags":["x_refsource_MISC","x_transferred","Permissions Required","web","report"]},{"url":"https://github.com/nextcloud/security-advisories/security/advisories/GHSA-wrwg-jwpg-r3c4","tags":["x_refsource_CONFIRM","x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://github.com/nextcloud/android/commit/aa47197109970b8449c4e44601eba36e3481b086","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://github.com/nextcloud/android/commit/b6ecf515b38c2d82d32743f27236534f3e03ee0c","tags":["x_refsource_MISC","x_transferred","Patch","Third Party Advisory","advisory","fix"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2021-41166","tags":["web"]}],"sources":{"cve":[{"id":"CVE-2021-41166","title":"Permission bypass in Nextcloud Android App","description":"The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.","status":"published","published":"2022-01-26T22:35:10Z","modified":"2025-04-23T19:09:02.193Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"cna"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:32:59.105382Z"}],"euvd":[{"id":"EUVD-2021-28274","description":"The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.","status":"published","published":"2022-01-26T22:35:10Z","modified":"2025-04-23T19:09:02Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T20:52:06.891582Z"}],"nvd":[{"id":"CVE-2021-41166","description":"The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.","status":"published","published":"2022-01-26T23:15:08.217Z","modified":"2026-06-17T04:08:00.553Z","cvss":[{"version":"3.1","score":4.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"secondary"},{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium","assessor":"primary"},{"version":"2.0","score":5,"vector":"AV:N/AC:L/Au:N/C:P/I:N/A:N","level":"medium","assessor":"primary"}],"cwes":["CWE-276"],"updated_at":"2026-11-02T14:07:04.178977Z"}],"osv":[{"id":"CVE-2021-41166","description":"The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.","status":"published","published":"2022-01-26T23:15:08.217Z","modified":"2026-10-24T10:51:25.571931693Z","cvss":[{"version":"3.1","score":5.3,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","level":"medium"}],"updated_at":"2026-11-02T15:44:21.249056Z"},{"id":"BIT-nextcloud-2021-41166","title":"Permission bypass in Nextcloud Android App","description":"The Nextcloud Android app is the Android client for Nextcloud, a self-hosted productivity platform. An issue in versions prior to 3.17.1 may lead to sensitive information disclosure. An unauthorized app that does not have the otherwise required `MANAGE_DOCUMENTS` permission may view image thumbnails for images it does not have permission to view. Version 3.17.1 contains a patch. There are no known workarounds.","status":"published","published":"2026-07-12T23:47:44.767Z","modified":"2026-09-08T08:48:16.227254703Z","updated_at":"2026-11-02T15:28:34.007508Z"}]}}