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cve/2025/CVE-2025-0239.md
0xMarcio cb00e1339f Update CVE list 2025-09-29 21:09
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CVE-2025-0239

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, Firefox ESR < 128.6, Thunderbird < 134, and Thunderbird < 128.6.

POC

Reference

Github

No PoCs found on GitHub currently.