CVE-2025-5270

SNI was sometimes unencrypted

CVSS 7.5 HIGHEPSS 0.2%CWE-319

Vexday Risk Score

21Bajo

Decisión SSVC (CISA)

Track

Sin señal de explotación → monitorear

CVSS 7.5EPSS 0.2%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

27 may 2025Publicada en NVD

Recomendación: Monitorear — sin señal de explotación por ahora.

In certain cases, SNI could have been sent unencrypted even when encrypted DNS was enabled. This vulnerability was fixed in Firefox 139 and Thunderbird 139.

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

Productos afectados

Mozilla · Firefox Mozilla · Thunderbird

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Referencias

https://bugzilla.mozilla.org/show_bug.cgi?id=1910298 https://www.mozilla.org/security/advisories/mfsa2025-42/https://www.mozilla.org/security/advisories/mfsa2025-45/