CVE-2025-0239 Information

Description

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 and Firefox ESR < 128.6.

Reference

https://bugzilla.mozilla.org/show_bug.cgi?id=1929156 https://www.mozilla.org/security/advisories/mfsa2025-01/ https://www.mozilla.org/security/advisories/mfsa2025-02/