| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 130.0 | 130.0 |
| firefox esr | ≥ 128.0, < 128.2< 115.15 | 128.2115.15 |
Firefox normally asks for confirmation before asking the operating system to find an application to handle a scheme that the browser does not support. It did not ask before doing so for the Usenet-related schemes news: and snews:. Since most operating systems don't have a trusted newsreader installed by default, an unscrupulous program that the user downloaded could register itself as a handler. The website that served the application download could then launch that application at will. This vulnerability affects Firefox < 130, Firefox ESR < 128.2, and Firefox ESR < 115.15.
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