Total vulnerabilities in the database
Mattermost fails to check if a custom emoji reaction exists when sending it to a post and to limit the amount of custom emojis allowed to be added in a post, allowing an attacker sending a huge amount of non-existent custom emojis in a post to crash the mobile app of a user seeing the post and to crash the server due to overloading when clients attempt to retrive the aforementioned post.
Software | From | Fixed in |
---|---|---|
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- | 8.1.8 |
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9.2.0 | 9.2.4 |
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9.1.0 | 9.1.5 |
mattermost / mattermost_server | - | 8.1.7.x |
mattermost / mattermost_server | 9.0.0 | 9.1.4.x |
mattermost / mattermost_server | 9.2.0 | 9.2.3.x |