CVE-2025-5270

firefox: SNI was sometimes unencrypted

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Severity

Low

Red Hat Product Security

3.4

CVSS 3.1

Review impact separately from score.

Published · May 27, 2025

Updated · November 21, 2025

Description

A flaw was found in Firefox. The Mozilla Foundation's Security Advisory describes the following issue: In certain cases, SNI could be sent unencrypted, even when encrypted DNS is enabled.

Statement

Red Hat Product Security rates the severity of this flaw as determined by the Mozilla Foundation Security Advisory.

CVSS score applicability

The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.

Mitigation

No mitigation is specified in collected source.

CVSS / CWE

CVSS 3.1 · 3.4
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N

CWE-319 · Cleartext Transmission of Sensitive Information