{"schemaVersion":3,"id":"USN-5058-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"thunderbird vulnerabilities\n\nIt was discovered that Thunderbird didn't ignore IMAP server responses\nprior to completion of the STARTTLS handshake. A person-in-the-middle\ncould potentially exploit this to trick Thunderbird into showing incorrect\ninformation. (CVE-2021-29969)\n\nMultiple security issues were discovered in Thunderbird. If a user were\ntricked into opening a specially crafted website in a browsing context, an\nattacker could potentially exploit these to cause a denial of service, or\nexecute arbitrary code. (CVE-2021-29970, CVE-2021-29976, CVE-2021-29980,\nCVE-2021-29984, CVE-2021-29985, CVE-2021-29986, CVE-2021-29988,\nCVE-2021-29989, CVE-2021-30547)","dates":{"published":"2021-08-31T12:15:03.000Z","modified":"2026-04-22T10:17:26.844Z","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":"ubuntu","product":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/thunderbird","purlType":"deb","versions":[{"text":"< 1:78.13.0+build1-0ubuntu0.18.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:78.13.0+build1-0ubuntu0.20.04.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1:78.13.0+build1-0ubuntu0.18.04.1 | < 1:78.13.0+build1-0ubuntu0.20.04.2","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5058-1","label":"ubuntu.com/security/notices/USN-5058-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-29969","label":"ubuntu.com/security/CVE-2021-29969","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29970","label":"ubuntu.com/security/CVE-2021-29970","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29976","label":"ubuntu.com/security/CVE-2021-29976","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29980","label":"ubuntu.com/security/CVE-2021-29980","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29984","label":"ubuntu.com/security/CVE-2021-29984","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29985","label":"ubuntu.com/security/CVE-2021-29985","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29986","label":"ubuntu.com/security/CVE-2021-29986","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29988","label":"ubuntu.com/security/CVE-2021-29988","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-29989","label":"ubuntu.com/security/CVE-2021-29989","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-30547","label":"ubuntu.com/security/CVE-2021-30547","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-29969","CVE-2021-29970","CVE-2021-29976","CVE-2021-29980","CVE-2021-29984","CVE-2021-29985","CVE-2021-29986","CVE-2021-29988","CVE-2021-29989","CVE-2021-30547"],"downstream":[],"duplicates":[],"related":["CVE-2021-29969","CVE-2021-29970","CVE-2021-29976","CVE-2021-29980","CVE-2021-29984","CVE-2021-29985","CVE-2021-29986","CVE-2021-29988","CVE-2021-29989","CVE-2021-30547"]},"timeline":[{"kind":"published","date":"2021-08-31T12:15:03.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T10:17:26.844Z","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":"2026-10-21T06:34:40.727Z","stale":false,"partial":false}}