A redirected HTTP request which is observed or modified through a web extension could bypass existing CORS checks, leading to potential disclosure of cross-origin information. This vulnerability affects Firefox ESR < 78.1, Firefox < 79, and Thunderbird < 78.1.
| Software | From | Fixed in |
|---|---|---|
| mozilla / thunderbird | - | 78.1 |
| mozilla / firefox_esr | - | 78.1 |
| mozilla / firefox | - | 79.0 |
| opensuse / leap | 15.2 | 15.2.x |
| canonical / ubuntu_linux | 18.04 | 18.04.x |
| canonical / ubuntu_linux | 20.04 | 20.04.x |
| canonical / ubuntu_linux | 16.04 | 16.04.x |