In specific HSTS configurations an attacker could have bypassed HSTS on a subdomain. This vulnerability affects Firefox < 122, Firefox ESR < 115.7, and Thunderbird < 115.7.
CVE ID: CVE-2024-0753
Vendor: Mozilla
Product: Firefox
EPSS Score: 0.15% (probability of being exploited)
EPSS Percentile: 52.04% (scored less or equal to compared to others)
EPSS Date: 2025-03-14 (when was this score calculated)