| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 94.0 | 94.0 |
| firefox esr | < 91.3.0 | 91.3.0 |
| thunderbird | < 91.3.0 | 91.3.0 |
Due to an unusual sequence of attacker-controlled events, a Javascript alert() dialog with arbitrary (although unstyled) contents could be displayed over top an uncontrolled webpage of the attacker's choosing. This vulnerability affects Firefox < 94, Thunderbird < 91.3, and Firefox ESR < 91.3.
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