By observing the stack trace for JavaScript errors in web workers, it was possible to leak the result of a cross-origin redirect. This applied only to content that can be parsed as script. This vulnerability affects Firefox < 79, Firefox ESR < 68.11, Firefox ESR < 78.1, Thunderbird < 68.11, and Thunderbird < 78.1.
| Software | From | Fixed in |
|---|---|---|
| mozilla / firefox | - | 79.0 |
| mozilla / firefox_esr | - | 68.11 |
| mozilla / thunderbird | - | 68.11 |
| mozilla / thunderbird | 78.0 | 78.1 |
| canonical / ubuntu_linux | 18.04 | 18.04.x |
| canonical / ubuntu_linux | 20.04 | 20.04.x |
| canonical / ubuntu_linux | 16.04 | 16.04.x |
| mozilla / firefox | 78.0 | 78.1 |