{"id":"CVE-2021-23957","published":"2021-02-26T02:08:50Z","modified":"2024-08-03T19:14:09Z","title":"Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox","vendor":"Mozilla","product":"Firefox","tier":"core","eol":null,"affectedVersions":[{"vendor":"Mozilla","product":"Firefox","versions":["< 85"]}],"description":{"text":"Navigations through the Android-specific `intent` URL scheme could have been misused to escape iframe sandbox. Note: This issue only affected Firefox for Android. Other operating systems are unaffected. This vulnerability affects Firefox < 85.","provenance":"source","from":"CVE.org"},"summary":null,"cvss":null,"epss":{"score":0.00793,"percentile":0.56274,"date":"2026-10-29","provenance":"source"},"kev":null,"vulncheckKev":{"dateAdded":"2023-09-27","exploitedFirstSeen":"2023-09-27","ransomware":false,"evidence":[{"url":"https://www.confiant.com/hubfs/ScamClub-Threat-Report-Q1Q2-2023.pdf","date":"2023-09-27"}],"evidenceTotal":1,"provenance":"source"},"exploited":true,"otx":{"pulseCount":0,"pulses":[],"provenance":"machine"},"cwes":[],"references":[{"url":"https://www.mozilla.org/security/advisories/mfsa2021-03/","tags":["x_refsource_MISC"]},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1584582","tags":["x_refsource_MISC"]}],"techniques":[],"reports":[],"affected":[],"advisories":[],"euvd":{"id":"EUVD-2021-10878","url":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2021-10878","exploited":false,"exploitedSince":null,"provenance":"source"},"exploits":[],"exploitSources":null,"exploitRefs":[],"flow":[],"timeline":[{"date":"2021-02-26","kind":"published","label":"Published (CVE.org)","url":"https://www.cve.org/CVERecord?id=CVE-2021-23957","provenance":"source"},{"date":"2023-09-27","kind":"exploited-reported","label":"Exploitation first reported (VulnCheck KEV evidence)","url":"https://www.confiant.com/hubfs/ScamClub-Threat-Report-Q1Q2-2023.pdf","provenance":"source"}],"speed":{"daysToPublicExploit":null,"firstExploitFrom":null,"daysToKev":null},"priority":{"score":46.3,"factors":[{"name":"In a KEV catalog","points":35.0,"detail":"listed in VulnCheck KEV"},{"name":"Recent KEV listing","points":0.0,"detail":"added 1128 days ago"},{"name":"Known ransomware use","points":0.0,"detail":"not known"},{"name":"EPSS percentile","points":11.25,"detail":"percentile 0.5627"},{"name":"Named in threat reports","points":0.0,"detail":"0 reports"},{"name":"Public exploit code","points":0.0,"detail":"none found"},{"name":"Mentioned in OTX pulses","points":0.0,"detail":"0 pulses"},{"name":"CVSS severity","points":0.0,"detail":"no CVSS"},{"name":"End-of-life product","points":0.0,"detail":"supported or unknown"}]}}