{"id":"CVE-2025-5263","published":"2025-05-27T12:29:22Z","modified":"2026-04-13T14:27:56Z","title":"Error handling for script execution was incorrectly isolated from web content","vendor":"Mozilla","product":"Firefox","tier":"tail","description":{"text":"Error handling for script execution was incorrectly isolated from web content, which could have allowed cross-origin leak attacks. This vulnerability was fixed in Firefox 139, Firefox ESR 115.24, Firefox ESR 128.11, Thunderbird 139, and Thunderbird 128.11.","provenance":"source","from":"CVE.org"},"cvss":{"score":4.3,"severity":"MEDIUM","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","provenance":"source","from":"CISA ADP Vulnrichment"},"epss":{"score":0.00265,"percentile":0.18443,"provenance":"source"},"cwes":[{"id":"CWE-346","name":"Origin Validation Error"}],"references":[{"url":"https://bugzilla.mozilla.org/show_bug.cgi?id=1960745","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-42/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-43/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-44/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-45/","tags":[]},{"url":"https://www.mozilla.org/security/advisories/mfsa2025-46/","tags":[]},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html","tags":[]},{"url":"https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html","tags":[]}],"priority":{"score":6.7,"factors":[{"name":"EPSS percentile","points":3.69},{"name":"CVSS severity","points":3.01}]},"vendorSlug":"mozilla","euvd":{"id":"EUVD-2025-18108","exploited":false,"provenance":"source"},"lineage":{"familyId":"fam-class-mozilla-firefox-cwe-346"}}