CVE-2025-5263mediumCWE-346

CVE-2025-5263: fallo de gravedad media en Mozilla Firefox

Error handling for script execution was incorrectly isolated from web content

Publicada el 27 may 2025 · Actualizada el 13 abr 2026

Seguir esta CVE + Monitorear Firefox + Monitorear Thunderbird

Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.

13Vexday Risk Score

Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.

ssvc Trackcvss 4.3epss 0.3%

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:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

Productos afectados

Mozilla · Firefox Mozilla · Thunderbird

CVEs relacionadas — Mozilla Firefox

En el mismo producto, de las más peligrosas a las menos.

CVE-2016-9079HIGHCVE-2016-9079EPSS 87.4%KEV CVE-2019-11708CRITICALCVE-2019-11708EPSS 55.9%KEV CVE-2019-17026HIGHCVE-2019-17026EPSS 46.3%KEV CVE-2019-11707HIGHCVE-2019-11707EPSS 38.0%KEV CVE-2024-9680CRITICALCVE-2024-9680EPSS 23.2%KEV CVE-2022-26485HIGHCVE-2022-26485EPSS 14.3%KEV

Referencias

https://bugzilla.mozilla.org/show_bug.cgi?id=1960745 https://lists.debian.org/debian-lts-announce/2025/05/msg00043.html https://lists.debian.org/debian-lts-announce/2025/05/msg00046.html 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/https://www.mozilla.org/security/advisories/mfsa2025-46/