CVE-2022-34479: Mozilla Firefox

Medium severity, CVSS 6.5. EPSS: 0.7% chance of exploitation in the next 30 days.

A malicious website that could create a popup could have resized the popup to overlay the address bar with its own content, resulting in potential user confusion or spoofing attacks. <br>*This bug only affects Thunderbird for Linux. Other operating systems are unaffected.*. This vulnerability affects Firefox < 102, Firefox ESR < 91.11, Thunderbird < 102, and Thunderbird < 91.11.

Affected products

• Mozilla Firefox: before 102.0 (fixed in 102.0)
• Mozilla Firefox ESR: before 91.11 (fixed in 91.11)
• Mozilla Thunderbird: before 91.11 (fixed in 91.11)

Published 2022-12-22. Last modified 2026-06-17.