Question: What is CVE-2025-0239?
Answer: CVE-2025-0239 is a vulnerability classified as medium with a CVSS score of 4.0. It falls under CWE-295 and affects the system as follows: 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.