CVE-2022-22756: Mozilla Firefox

High severity, CVSS 8.8. EPSS: 0.9% chance of exploitation in the next 30 days.

If a user was convinced to drag and drop an image to their desktop or other folder, the resulting object could have been changed into an executable script which would have run arbitrary code after the user clicked on it. This vulnerability affects Firefox < 97, Thunderbird < 91.6, and Firefox ESR < 91.6.

Affected products

• Mozilla Firefox: before 97.0 (fixed in 97.0)
• Mozilla Firefox ESR: before 91.6 (fixed in 91.6)
• Mozilla Thunderbird: before 91.6 (fixed in 91.6)

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