CVE-2024-1550: Debian Linux

Medium severity, CVSS 6.1. EPSS: 0.6% chance of exploitation in the next 30 days.

A malicious website could have used a combination of exiting fullscreen mode and `requestPointerLock` to cause the user's mouse to be re-positioned unexpectedly, which could have led to user confusion and inadvertently granting permissions they did not intend to grant. This vulnerability affects Firefox < 123, Firefox ESR < 115.8, and Thunderbird < 115.8.

Affected products

• Debian Debian Linux: version 10.0 only
• Mozilla Firefox: before 115.8.0 (fixed in 115.8.0); before 123.0 (fixed in 123.0)
• Mozilla Thunderbird: before 115.8.0 (fixed in 115.8.0)

Published 2024-02-20. Last modified 2026-06-17.