The vulnerability of the TransferFromImageBitmap method in Thunderbird email clients and Firefox and Firefox ESR browsers relates to the ability to read canvas elements, ignoring security policies that would prevent unauthorized access to information.

The vulnerability of the TransferFromImageBitmap method in Thunderbird email clients and Firefox and Firefox ESR browsers is related to the ability to read canvas elements, while ignoring security policies. Exploiting this vulnerability can allow an attacker who operates remotely to gain...