{"schemaVersion":3,"id":"USN-4299-1","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, spoof the URL or\nother browser chrome, obtain sensitive information, bypass Content\nSecurity Policy (CSP) protections, or execute arbitrary code.\n(CVE-2019-20503, CVE-2020-6805, CVE-2020-6806, CVE-2020-6807,\nCVE-2020-6808, CVE-2020-6810, CVE-2020-6812, CVE-2020-6813, CVE-2020-6814,\nCVE-2020-6815)\n\nIt was discovered that Web Extensions with the all-url permission could\naccess local files. If a user were tricked in to installing a specially\ncrafted extension, an attacker could potentially exploit this to obtain\nsensitive information. (CVE-2020-6809)\n\nIt was discovered that the Devtools' 'Copy as cURL' feature did not fully\nescape website-controlled data. If a user were tricked in to using the\n'Copy as cURL' feature to copy and paste a command with specially crafted\ndata in to a terminal, an attacker could potentially exploit this to\nexecute arbitrary commands via command injection. (CVE-2020-6811)","dates":{"published":"2020-03-11T21:53:33.000Z","modified":"2026-04-27T15:48:44.459Z","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":"< 74.0+build3-0ubuntu0.16.04.1","noFixRecorded":false,"fixedIn":null},{"text":"< 74.0+build3-0ubuntu0.18.04.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 74.0+build3-0ubuntu0.16.04.1 | < 74.0+build3-0ubuntu0.18.04.1","eol":null,"hubHref":null}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://ubuntu.com/security/notices/USN-4299-1","label":"ubuntu.com/security/notices/USN-4299-1","hostname":"ubuntu.com","tags":["Advisory"]},{"url":"https://ubuntu.com/security/CVE-2019-20503","label":"ubuntu.com/security/CVE-2019-20503","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6805","label":"ubuntu.com/security/CVE-2020-6805","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6806","label":"ubuntu.com/security/CVE-2020-6806","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6807","label":"ubuntu.com/security/CVE-2020-6807","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6808","label":"ubuntu.com/security/CVE-2020-6808","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6809","label":"ubuntu.com/security/CVE-2020-6809","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6810","label":"ubuntu.com/security/CVE-2020-6810","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6811","label":"ubuntu.com/security/CVE-2020-6811","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6812","label":"ubuntu.com/security/CVE-2020-6812","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6813","label":"ubuntu.com/security/CVE-2020-6813","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6814","label":"ubuntu.com/security/CVE-2020-6814","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://ubuntu.com/security/CVE-2020-6815","label":"ubuntu.com/security/CVE-2020-6815","hostname":"ubuntu.com","tags":["REPORT"]}],"lineage":{"upstream":["CVE-2019-20503","CVE-2020-6805","CVE-2020-6806","CVE-2020-6807","CVE-2020-6808","CVE-2020-6809","CVE-2020-6810","CVE-2020-6811","CVE-2020-6812","CVE-2020-6813","CVE-2020-6814","CVE-2020-6815"],"downstream":[],"duplicates":[],"related":["CVE-2019-20503","CVE-2020-6805","CVE-2020-6806","CVE-2020-6807","CVE-2020-6808","CVE-2020-6809","CVE-2020-6810","CVE-2020-6811","CVE-2020-6812","CVE-2020-6813","CVE-2020-6814","CVE-2020-6815"]},"timeline":[{"kind":"published","date":"2020-03-11T21:53:33.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-04-27T15:48:44.459Z","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":"2026-10-19T22:21:32.118Z","stale":false,"partial":false}}