When using X11, text selected by the page using the Selection API was erroneously copied into the primary selection, a temporary storage not unlike the clipboard. This bug only affects Firefox on X11. Other systems are unaffected. This vulnerability affects Firefox < 120, Firefox ESR < 115.5.0, and Thunderbird < 115.5.
| Software | From | Fixed in |
|---|---|---|
| mozilla / thunderbird | - | 115.5 |
| mozilla / firefox | - | 120.0 |
| mozilla / firefox_esr | - | 115.5.0 |
| debian / debian_linux | 10.0 | 10.0.x |
| debian / debian_linux | 11.0 | 11.0.x |
| debian / debian_linux | 12.0 | 12.0.x |