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CVE-2022-31739

Description

When downloading files on Windows, the % character was not escaped, which could have lead to a download incorrectly being saved to attacker-influenced paths that used variables such as %HOMEPATH% or %APPDATA%.
*This bug only affects Firefox for Windows. Other operating systems are unaffected.*. This vulnerability affects Thunderbird < 91.10, Firefox < 101, and Firefox ESR < 91.10.

POC

Reference

- https://bugzilla.mozilla.org/show_bug.cgi?id=1765049

Github

- https://github.com/zhchbin/zhchbin