{"schemaVersion":3,"id":"MGASA-2021-0421","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated nextcloud-client packages fix security vulnerability\n\nNextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate\nvalidation due to lack of SSL certificate verification when using the\n\"Register with a Provider\" flow. (CVE-2021-22895)\n\nIn versions prior to 3.3.0, the Nextcloud Desktop client fails to check if\na private key belongs to previously downloaded public certificate. If the\nNextcloud instance serves a malicious public key, the data would be\nencrypted for this key and thus could be accessible to a malicious actor.\nThis issue is fixed in Nextcloud Desktop Client version 3.3.0","dates":{"published":"2021-09-23T04:49:29.000Z","modified":"2026-04-16T04:44:45.283Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":null,"severity":"unknown","version":null,"versionLabel":null,"source":null,"vector":null,"computed":false,"selection":"none"},"metrics":[]},"epss":{"probability":null,"percentile":null,"severity":"unknown","asOf":null,"change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[],"last30":[]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[],"affected":[{"vendor":"mageia","product":"nextcloud-client","name":"nextcloud-client","label":"nextcloud-client","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/nextcloud-client","purlType":"rpm","versions":[{"text":"< 3.3.3-1.mga8","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 3.3.3-1.mga8","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2021-0421.html","label":"advisories.mageia.org/MGASA-2021-0421.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=29043","label":"bugs.mageia.org/show_bug.cgi?id=29043","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/source-package/nextcloud-desktop","label":"security-tracker.debian.org/tracker/source-package/nextcloud-desktop","hostname":"security-tracker.debian.org","tags":["WEB"]}],"lineage":{"upstream":["CVE-2021-22895","CVE-2021-32728"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-09-23T04:49:29.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-16T04:44:45.283Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":0,"level":"minimal","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T13:02:16.394Z","stale":false,"partial":false}}