{"schemaVersion":3,"id":"MGASA-2021-0066","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Updated thunderbird packages fix security vulnerabilities\n\nCross-origin information leakage via redirected PDF requests. (CVE-2021-23953)\n\nType confusion when using logical assignment operators in JavaScript switch\nstatements. (CVE-2021-23954)\n\nIMAP Response Injection when using STARTTLS. (CVE-2020-15685)\n\nHTTPS pages could have been intercepted by a registered service worker when\nthey should not have been. (CVE-2020-26976)\n\nUse-after-poison for incorrectly redeclared JavaScript variables during GC.\n(CVE-2021-23960)\n\nMemory safety bugs fixed in Thunderbird 78.7. (CVE-2021-23964).","dates":{"published":"2021-02-04T13:40:24.000Z","modified":"2026-04-16T04:42:49.115Z","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":"thunderbird","name":"thunderbird","label":"thunderbird","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/thunderbird","purlType":"rpm","versions":[{"text":"< 78.7.0-1.mga7","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 78.7.0-1.mga7","eol":null,"hubHref":null},{"vendor":"mageia","product":"thunderbird-l10n","name":"thunderbird-l10n","label":"thunderbird-l10n","ecosystem":"Mageia","cpePart":null,"purl":"pkg:rpm/mageia/thunderbird-l10n","purlType":"rpm","versions":[{"text":"< 78.7.0-1.mga7","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 78.7.0-1.mga7","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://advisories.mageia.org/MGASA-2021-0066.html","label":"advisories.mageia.org/MGASA-2021-0066.html","hostname":"advisories.mageia.org","tags":["Advisory"]},{"url":"https://bugs.mageia.org/show_bug.cgi?id=28247","label":"bugs.mageia.org/show_bug.cgi?id=28247","hostname":"bugs.mageia.org","tags":["REPORT"]},{"url":"https://www.mozilla.org/en-US/security/advisories/mfsa2021-05/","label":"www.mozilla.org/en-US/security/advisories/mfsa2021-05/","hostname":"www.mozilla.org","tags":["Advisory"]},{"url":"https://www.thunderbird.net/en-US/thunderbird/78.7.0/releasenotes/","label":"www.thunderbird.net/en-US/thunderbird/78.7.0/releasenotes/","hostname":"www.thunderbird.net","tags":["WEB"]}],"lineage":{"upstream":["CVE-2020-15685","CVE-2020-26976","CVE-2021-23953","CVE-2021-23954","CVE-2021-23960","CVE-2021-23964"],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2021-02-04T13:40:24.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-16T04:42:49.115Z","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":"2026-10-20T14:57:14.383Z","stale":false,"partial":false}}