{"cve":"CVE-2025-5263","nvd":{"published":"2025-05-27T13:15:22.100","modified":"2026-10-05T15:10:00.590","status":"Modified","description":"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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N","score":4.3},"cwes":["CWE-346"],"references":["https://bugzilla.mozilla.org/show_bug.cgi?id=1960745","https://www.mozilla.org/security/advisories/mfsa2025-42/","https://www.mozilla.org/security/advisories/mfsa2025-43/","https://www.mozilla.org/security/advisories/mfsa2025-44/","https://www.mozilla.org/security/advisories/mfsa2025-45/"],"products":["mozilla:firefox"],"source":"nvd","synced_at":"2026-10-19T22:01:57.636215869+00:00"},"epss":{"cve":"CVE-2025-5263","score":0.00265,"percentile":0.18291,"date":"2026-10-25"},"kev":null,"osv":[],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}