{"schemaVersion":3,"id":"SUSE-SU-2021:3993-1","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Security update for MozillaFirefox\n\nThis update for MozillaFirefox fixes the following issues:\n\nUpdate to Extended Support Release 91.4.0 (bsc#1193485):\n\n- CVE-2021-43536: URL leakage when navigating while executing asynchronous function\n- CVE-2021-43537: Heap buffer overflow when using structured clone\n- CVE-2021-43538: Missing fullscreen and pointer lock notification when requesting both\n- CVE-2021-43539: GC rooting failure when calling wasm instance methods\n- CVE-2021-43541: External protocol handler parameters were unescaped\n- CVE-2021-43542: XMLHttpRequest error codes could have leaked the existence of an external protocol handler\n- CVE-2021-43543: Bypass of CSP sandbox directive when embedding\n- CVE-2021-43545: Denial of Service when using the Location API in a loop\n- CVE-2021-43546: Cursor spoofing could overlay user interface when native cursor is zoomed\n- Memory safety bugs fixed in Firefox 95 and Firefox ESR 91.4\n- Removed x-scheme-handler/ftp from MozillaFirefox.desktop (bsc#1193321)","dates":{"published":"2021-12-10T14:04:20.000Z","modified":"2026-02-04T02:21:41.920Z","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":"suse","product":"MozillaFirefox&distro=SUSE Linux Enterprise Module for Desktop Applications 15 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91.4.0-152.9.1","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://www.suse.com/support/update/announcement/2021/suse-su-20213993-1/","label":"www.suse.com/support/update/announcement/2021/suse-su-20213993-1/","hostname":"www.suse.com","tags":["Advisory"]},{"url":"https://bugzilla.suse.com/1193321","label":"bugzilla.suse.com/1193321","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://bugzilla.suse.com/1193485","label":"bugzilla.suse.com/1193485","hostname":"bugzilla.suse.com","tags":["REPORT"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43536","label":"www.suse.com/security/cve/CVE-2021-43536","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43537","label":"www.suse.com/security/cve/CVE-2021-43537","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43538","label":"www.suse.com/security/cve/CVE-2021-43538","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43539","label":"www.suse.com/security/cve/CVE-2021-43539","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43541","label":"www.suse.com/security/cve/CVE-2021-43541","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43542","label":"www.suse.com/security/cve/CVE-2021-43542","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43543","label":"www.suse.com/security/cve/CVE-2021-43543","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43545","label":"www.suse.com/security/cve/CVE-2021-43545","hostname":"www.suse.com","tags":["WEB"]},{"url":"https://www.suse.com/security/cve/CVE-2021-43546","label":"www.suse.com/security/cve/CVE-2021-43546","hostname":"www.suse.com","tags":["WEB"]}],"lineage":{"upstream":["CVE-2021-43536","CVE-2021-43537","CVE-2021-43538","CVE-2021-43539","CVE-2021-43541","CVE-2021-43542","CVE-2021-43543","CVE-2021-43545","CVE-2021-43546"],"downstream":[],"duplicates":[],"related":["CVE-2021-43536","CVE-2021-43537","CVE-2021-43538","CVE-2021-43539","CVE-2021-43541","CVE-2021-43542","CVE-2021-43543","CVE-2021-43545","CVE-2021-43546"]},"timeline":[{"kind":"published","date":"2021-12-10T14:04:20.000Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-02-04T02:21:41.920Z","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":"2026-10-22T23:33:06.254Z","stale":false,"partial":false}}