GHSA-6mx3-9qfh-77gj
Mattermost denial of service through long emoji value
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.3.0, < 9.3.1 | 9.3.1 |
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.2.0, < 9.2.5 | 9.2.5 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost fails to properly validate the length of the emoji value in the custom user status, allowing an attacker to send multiple times a very long string as an emoji value causing high resource consumption and possibly crashing the server.
References
External links from the advisory. They lead to third-party sites.