When navigating from inside an iframe while requesting fullscreen access, an attacker-controlled tab could have made the browser unable to leave fullscreen mode. This vulnerability affects Firefox ESR < 91.5, Firefox < 96, and Thunderbird < 91.5.
2022-12-22T20:15:15.157
2025-04-16T16:15:22.267
Modified
CVSSv3.1: 4.3 (MEDIUM)
| Type | Vendor | Product | Version/Range | Vulnerable? |
|---|---|---|---|---|
| Application | mozilla | firefox | < 96.0 | Yes |
| Application | mozilla | firefox_esr | < 91.5 | Yes |
| Application | mozilla | thunderbird | < 91.5 | Yes |