CVE-2025-13016: Mozilla Firefox

High severity, CVSS 7.5. EPSS: 0.4% chance of exploitation in the next 30 days.

Incorrect boundary conditions in the JavaScript: WebAssembly component. This vulnerability was fixed in Firefox 145, Firefox ESR 140.5, Thunderbird 145, and Thunderbird 140.5.

Affected products

• Mozilla Firefox: before 140.5.0 (fixed in 140.5.0); before 145.0 (fixed in 145.0)

Published 2025-11-11. Last modified 2026-06-17.