CVE-2023-1945: Mozilla Firefox ESR

Medium severity, CVSS 6.5. EPSS: 0.6% chance of exploitation in the next 30 days.

Unexpected data returned from the Safe Browsing API could have led to memory corruption and a potentially exploitable crash. This vulnerability affects Thunderbird < 102.10 and Firefox ESR < 102.10.

Affected products

• Mozilla Firefox ESR: before 102.10 (fixed in 102.10)
• Mozilla Thunderbird: before 102.10 (fixed in 102.10)

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