5.3
Medium
CVE-2024-9398 By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if…
Description
By checking the result of calls to `window.open` with specifically set protocol handlers, an attacker could determine if the application which implements that protocol handler is installed. This vulnerability affects Firefox < 131, Firefox ESR < 128.3, Thunderbird < 128.3, and Thunderbird < 131.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Firefox 131 | earliest → < 131 | 131 |
| Firefox ESR 128.3 | earliest → < 128.3 | 128.3 |
| Thunderbird 131 | earliest → < 131 | 131 |
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