On Windows 10, when using the Save As functionality, an attacker could have tricked the browser into saving the file with a disallowed extension such as .url by including an invalid character in the extension. Note: This issue only affected Windows operating systems. Other operating systems are unaffected. This vulnerability affects Firefox < 127, Firefox ESR < 115.12, and Thunderbird < 115.12.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Firefox | Mozilla | * | 115.12 (excluding) |
| Firefox | Mozilla | * | 127.0 (excluding) |
| Thunderbird | Mozilla | * | 115.12 (excluding) |