Vulnerability · NVD
CVE-2025-0239
MEDIUM 4.0
When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability was fixed in Firefox 134, Firefox ESR 128.6, Thunderbird 134, and Thunderbird 128.6.
Attack vector : Local
No privileges required
No user interaction
Show raw CVSS vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
EPSS
0.23%
exploit very unlikely
percentile 13.4%
Tracked apps referencing this CVE
For each app: the affected range, the fixing version, and where the tracked app stands today.
Vulnerable CPE configurations (2)
| Vendor | Product | Platform | Versions | CPE 2.3 URI |
|---|---|---|---|---|
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | <128.6.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |
| mozilla |
thunderbird All platforms (wildcard)
|
All platforms (wildcard) | ≥129.0 <134.0 | cpe:2.3:a:mozilla:thunderbird:*:*:*:*:*:*:*:* |