CVE-2025-5263 Information

Description

Error handling for script execution was incorrectly isolated from web content which could have allowed cross-origin leak attacks. This vulnerability affects Firefox < 139 Firefox ESR < 115.24 and Firefox ESR < 128.11.

Reference

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/