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.
Metrics
Affected Vendors & Products
Advisories
Source | ID | Title |
---|---|---|
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EUVD-2024-0474 | Mattermost vulnerable to denial of service via large number of emoji reactions |
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GHSA-32h7-7j94-8fc2 | Mattermost vulnerable to denial of service via large number of emoji reactions |
Fixes
Solution
Update Mattermost Server to versions 9.3.0, 9.2.4, 9.1.5, 8.1.8 or higher.
Workaround
No workaround given by the vendor.
References
Link | Providers |
---|---|
https://mattermost.com/security-updates |
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History
No history.

Status: PUBLISHED
Assigner: Mattermost
Published:
Updated: 2024-08-01T18:40:20.579Z
Reserved: 2024-02-09T14:53:28.621Z
Link: CVE-2024-1402

Updated: 2024-08-01T18:40:20.579Z

Status : Modified
Published: 2024-02-09T16:15:07.880
Modified: 2024-11-21T08:50:30.447
Link: CVE-2024-1402

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