CVE-2023-32215: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

Mozilla developers and community members Gabriele Svelto, Andrew Osmond, Emily McDonough, Sebastian Hengst, Andrew McCreight and the Mozilla Fuzzing Team reported memory safety bugs present in Firefox 112 and Firefox ESR 102.10. Some of these bugs showed evidence of memory corruption and we presume that with enough effort some of these could have been exploited to run arbitrary code. This vulnerability affects Firefox < 113, Firefox ESR < 102.11, and Thunderbird < 102.11.

Affected products

• Mozilla Firefox: before 113.0 (fixed in 113.0)
• Mozilla Firefox ESR: before 102.11 (fixed in 102.11)
• Mozilla Thunderbird: before 102.11 (fixed in 102.11)

Published 2023-06-02. Last modified 2026-06-17.