VulnerabilityModified
CVE-2025-5270
This vulnerability was fixed in Firefox 139 and Thunderbird 139.
HIGH 7.5EPSS 0.29%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.29%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
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 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
- EPSS
- 0.29% probability · 21th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-319
- Affected
- mozilla/firefox
- Source
- security@mozilla.org
References
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.