The vulnerability of Firefox ESR, Firefox, and the email client Thunderbird exists due to insufficient checking of parameters in messages from the child process to the parent process. This allows a malicious actor to execute arbitrary code.

The vulnerability of Firefox ESR, Firefox, and the email client Thunderbird exists due to insufficient checking of parameters in messages from the child process to the parent process. Exploiting this vulnerability allows a malicious actor to execute arbitrary code on the target system by causing...