| Package | Affected versions | Patched versions |
|---|---|---|
| firefox | < 110.0 | 110.0 |
| firefox esr | < 102.8 | 102.8 |
| thunderbird | < 102.8 | 102.8 |
Permission prompts for opening external schemes were only shown for <code>ContentPrincipals</code> resulting in extensions being able to open them without user interaction via <code>ExpandedPrincipals</code>. This could lead to further malicious actions such as downloading files or interacting with software already installed on the system. This vulnerability affects Firefox < 110, Thunderbird < 102.8, and Firefox ESR < 102.8.
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