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| Package Name | Ecosystem | Vulnerable Versions | First Patched Version |
|---|---|---|---|
| github.com/mattermost/mattermost/server/v8 | go | >= 9.4.0, < 9.4.2 | 9.4.2 |
| github.com/mattermost/mattermost/server/v8 | go | >= 9.3.0, < 9.3.1 | 9.3.1 |
| github.com/mattermost/mattermost/server/v8 | go | >= 9.2.0, < 9.2.5 | 9.2.5 |
| github.com/mattermost/mattermost/server/v8 | go | < 8.1.9 | 8.1.9 |
The vulnerability stems from missing permission checks when re-inviting existing guests across teams. Core team invitation functions in both application logic (TeamService) and API layer (api4) are prime candidates because:
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