{"id":"CVE-2020-26954","title":"When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins","summary":"When accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI s…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","vendor":"mozilla","product":"firefox_mobile","affected":["firefox_mobile < 83.0"],"patched":["firefox_mobile 83.0"],"published":"2020-12-09","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2020-26954","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1657026","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2020-50/","label":"security@mozilla.org"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1657026","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mozilla.org/security/advisories/mfsa2020-50/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00643,"epssPercentile":0.50618,"ingestedAt":"2026-08-19T15:41:14.807Z","slug":"CVE-2020-26954","body":"## Overview\n\nWhen accepting a malicious intent from other installed apps, Firefox for Android accepted manifests from arbitrary file paths and allowed declaring webapp manifests for other origins. This could be used to gain fullscreen access for UI spoofing and could also lead to cross-origin attacks on targeted websites. *Note: This issue only affected Firefox for Android. Other operating systems are unaffected.*. This vulnerability affects Firefox < 83.\n\n## Affected\n\n- `firefox_mobile < 83.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox_mobile 83.0`","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}