CVE-2025-5270

HIGH EPSS 14.2%
Published May 27, 20251y ago · Modified Jun 17, 20261w ago
7.5 CVSS 3.1
High
Find Similar
Published May 27, 2025 1y ago
Last Modified Jun 17, 2026 1w ago

Description

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 Details

Base Score
7.5
Exploitability
3.9
Impact
3.6
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction None
Scope Unchanged
Confidentiality High
Integrity None
Availability None

Threat Intelligence

EPSS Exploit Probability
14.2% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available

Weaknesses 1

CWE-319

Affected Products 1

VendorProductVersionRange
mozillafirefox* <139.0

References 3

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

Remediation

No remediation data recorded yet

Check vendor advisories and the NVD entry for patch availability.