{"schemaVersion":3,"id":"USN-5131-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"firefox vulnerabilities\n\nMultiple security issues were discovered in Firefox. If a user were\ntricked into opening a specially crafted website, an attacker could\npotentially exploit these to cause a denial of service, bypass security\nrestrictions, spoof the browser UI, confuse the user, conduct phishing\nattacks, or execute arbitrary code. (CVE-2021-38503, CVE-2021-38504,\nCVE-2021-38506, CVE-2021-38507, CVE-2021-38508, CVE-2021-38509)\n\nIt was discovered that the 'Copy Image Link' context menu action\nwould copy the final image URL after redirects. If a user were tricked\ninto copying and pasting a link for an embedded image that triggered\nauthentication flows back to the page, an attacker could potentially\nexploit this to steal authentication tokens.","dates":{"published":"2021-11-03T20:09:06.000Z","modified":"2026-04-22T10:18:49.577Z","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":"< 94.0+build3-0ubuntu0.18.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 94.0+build3-0ubuntu0.20.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 94.0+build3-0ubuntu0.18.04.1 | < 94.0+build3-0ubuntu0.20.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-5131-1","label":"ubuntu.com/security/notices/USN-5131-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2021-38503","label":"ubuntu.com/security/CVE-2021-38503","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-38504","label":"ubuntu.com/security/CVE-2021-38504","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-38506","label":"ubuntu.com/security/CVE-2021-38506","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-38507","label":"ubuntu.com/security/CVE-2021-38507","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-38508","label":"ubuntu.com/security/CVE-2021-38508","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2021-38509","label":"ubuntu.com/security/CVE-2021-38509","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2021-38503","CVE-2021-38504","CVE-2021-38506","CVE-2021-38507","CVE-2021-38508","CVE-2021-38509"],"downstream":[],"duplicates":[],"related":["CVE-2021-38503","CVE-2021-38504","CVE-2021-38506","CVE-2021-38507","CVE-2021-38508","CVE-2021-38509"]},"timeline":[{"kind":"published","date":"2021-11-03T20:09:06.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-22T10:18:49.577Z","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":"2026-10-21T09:28:32.331Z","stale":false,"partial":false}}