{"schemaVersion":3,"id":"USN-4717-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"firefox vulnerabilities\n\nMultiple security issues were discovered in Firefox. If a user were\ntricked in to opening a specially crafted website, an attacker could\npotentially exploit these to cause a denial of service, obtain sensitive\ninformation, conduct clickjacking attacks, or execute arbitrary code.","dates":{"published":"2021-02-01T23:24:03.000Z","modified":"2026-04-22T10:10:57.146Z","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":"firefox","name":"firefox","label":"firefox","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/firefox","purlType":"deb","versions":[{"text":"< 85.0+build1-0ubuntu0.16.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 85.0+build1-0ubuntu0.18.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 85.0+build1-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 85.0+build1-0ubuntu0.16.04.1 | < 85.0+build1-0ubuntu0.18.04.1 | < 85.0+build1-0ubuntu0.20.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4717-1","label":"ubuntu.com/security/notices/USN-4717-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-23953","label":"ubuntu.com/security/CVE-2021-23953","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23954","label":"ubuntu.com/security/CVE-2021-23954","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23955","label":"ubuntu.com/security/CVE-2021-23955","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23956","label":"ubuntu.com/security/CVE-2021-23956","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23958","label":"ubuntu.com/security/CVE-2021-23958","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23960","label":"ubuntu.com/security/CVE-2021-23960","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23961","label":"ubuntu.com/security/CVE-2021-23961","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23962","label":"ubuntu.com/security/CVE-2021-23962","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23963","label":"ubuntu.com/security/CVE-2021-23963","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23964","label":"ubuntu.com/security/CVE-2021-23964","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-23965","label":"ubuntu.com/security/CVE-2021-23965","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-23953","CVE-2021-23954","CVE-2021-23955","CVE-2021-23956","CVE-2021-23958","CVE-2021-23960","CVE-2021-23961","CVE-2021-23962","CVE-2021-23963","CVE-2021-23964","CVE-2021-23965"],"downstream":[],"duplicates":[],"related":["CVE-2021-23953","CVE-2021-23954","CVE-2021-23955","CVE-2021-23956","CVE-2021-23958","CVE-2021-23960","CVE-2021-23961","CVE-2021-23962","CVE-2021-23963","CVE-2021-23964","CVE-2021-23965"]},"timeline":[{"kind":"published","date":"2021-02-01T23:24:03.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T10:10:57.146Z","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":"2026-10-19T19:34:29.330Z","stale":false,"partial":false}}