Vulnerabilities
Vulnerable Software

Vulnerability Details CVE-2025-0239

When using Alt-Svc, ALPN did not properly validate certificates when the original server is redirecting to an insecure site. This vulnerability affects Firefox < 134, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.0
EPSS Ranking 11.9%
CVSS Severity
CVSS v3 Score 4.0
Products affected by CVE-2025-0239


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