CVE-2022-26383

Name of the Vulnerable Software and Affected Versions Firefox versions prior to 98 Firefox ESR versions prior to 91.7 Thunderbird versions prior to 91.7

Description The issue is related to insufficient warning about dangerous actions when resizing a popup after requesting fullscreen access. This allows a remote attacker to perform a spoofing attack by not displaying the fullscreen notification. The vulnerability can be exploited remotely.

Recommendations For Firefox versions prior to 98, update to version 98 or later. For Firefox ESR versions prior to 91.7, update to version 91.7 or later. For Thunderbird versions prior to 91.7, update to version 91.7 or later. As a temporary workaround, consider disabling the fullscreen access feature until a patch is available. Restrict access to the popup window to minimize the risk of exploitation. Avoid using the popup window after requesting fullscreen access until the issue is resolved.