{"id":"CVE-2023-29540","title":"Using a redirect embedded into <code>sourceMappingUrls</code> could allow for navigation to external protocol links in sandboxed iframes without <code>allow-top-navigation-to-custom-protocols</code>","summary":"Using a redirect embedded into <code>sourceMappingUrls</code> could allow for navigation to external protocol links in sandboxed iframes without <code>allow-top-navigation-to-custom-protocols</code>. This vulnerability affects Firefox fo…","severity":"medium","cvss":6.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","cwe":["CWE-601"],"vendor":"mozilla","product":"firefox","affected":["firefox < 112.0","firefox_mobile < 112.0","focus < 112.0"],"patched":["firefox 112.0","firefox_mobile 112.0","focus 112.0"],"published":"2023-06-02","updated":"2026-08-19","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2023-29540","references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1790542","label":"security@mozilla.org"},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-13/","label":"security@mozilla.org"},{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1790542","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.mozilla.org/security/advisories/mfsa2023-13/","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.00315,"epssPercentile":0.24681,"ingestedAt":"2026-08-19T15:41:15.618Z","slug":"CVE-2023-29540","body":"## Overview\n\nUsing a redirect embedded into <code>sourceMappingUrls</code> could allow for navigation to external protocol links in sandboxed iframes without <code>allow-top-navigation-to-custom-protocols</code>. This vulnerability affects Firefox for Android < 112, Firefox < 112, and Focus for Android < 112.\n\n## Affected\n\n- `firefox < 112.0`\n- `firefox_mobile < 112.0`\n- `focus < 112.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `firefox 112.0`\n- `firefox_mobile 112.0`\n- `focus 112.0`","depth":"sunlit","depthScore":34,"depthScoreParts":{"impact":33.6,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}