A race condition could have led to private browsing tabs being opened in normal browsing windows. This could have resulted in a potential privacy leak. This vulnerability affects Firefox < 135, Firefox ESR < 128.7, Thunderbird < 128.7, and Thunderbird < 135.
CVE ID: CVE-2025-1013
Vendor: Mozilla
Product: Firefox
EPSS Score: 0.05% (probability of being exploited)
EPSS Percentile: 18.33% (scored less or equal to compared to others)
EPSS Date: 2025-03-05 (when was this score calculated)