An attacker could have caused a use-after-free via the Custom Highlight API, leading to a potentially exploitable crash. This vulnerability affects Firefox < 135, Firefox ESR < 115.20, Firefox ESR < 128.7, Thunderbird < 128.7, and Thunderbird < 135.
CVE ID: CVE-2025-1010
Vendor: Mozilla
Product: Firefox
EPSS Score: 0.08% (probability of being exploited)
EPSS Percentile: 38.55% (scored less or equal to compared to others)
EPSS Date: 2025-03-05 (when was this score calculated)