CVE-2025-5263
Error handling for script execution was incorrectly isolated from web content
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
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.
| Vendor | mozilla |
| Product | firefox |
| Ecosystems | |
| Industries | Technology |
| Published | May 27, 2025 |
| Last Updated | Apr 13, 2026 |
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Affected Versions
Mozilla / Firefox
All versions affected Mozilla / Thunderbird
All versions affected References
bugzilla.mozilla.org: https://bugzilla.mozilla.org/show_bug.cgi?id=1960745 mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-42/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-43/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-44/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-45/ mozilla.org: https://www.mozilla.org/security/advisories/mfsa2025-46/ lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html lists.debian.org: https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html
Credits
terjanq