Description

A flaw in handling fullscreen transitions may have inadvertently caused the application to become stuck in fullscreen mode when a modal dialog was opened during the transition. This issue left users unable to exit fullscreen mode using standard actions like pressing "Esc" or accessing right-click menus, resulting in a disrupted browsing experience until the browser is restarted.
*This bug only affects the application when running on macOS. Other operating systems are unaffected.* This vulnerability affects Firefox < 133, Firefox ESR < 128.5, Thunderbird < 133, and Thunderbird < 128.5.

Classification

CVE ID: CVE-2024-11698

CVSS Base Severity: CRITICAL

CVSS Base Score: 9.8

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected Products

Vendor: Mozilla

Product: Firefox

Exploit Prediction Scoring System (EPSS)

EPSS Score: 0.05% (probability of being exploited)

EPSS Percentile: 17.81% (scored less or equal to compared to others)

EPSS Date: 2025-02-03 (when was this score calculated)

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1916152
https://www.mozilla.org/security/advisories/mfsa2024-63/
https://www.mozilla.org/security/advisories/mfsa2024-64/
https://www.mozilla.org/security/advisories/mfsa2024-67/
https://www.mozilla.org/security/advisories/mfsa2024-68/

Timeline