The vulnerability of the CORS mechanism in Mozilla Firefox, Firefox ESR, and the Thunderbird email client allows attackers to circumvent security restrictions and gain unauthorized access to protected information.

The vulnerability of the CORS mechanism in Mozilla Firefox, Firefox ESR, and the email client Thunderbird is related to a data source confirmation error during the processing of the resource://pdf.js path. Exploiting this vulnerability can allow an attacker to bypass security restrictions and gai...