GHSA-r4fm-g65h-cr54
Mattermost incorrectly allows access individual posts
Packages
| Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|
| Go | github.com/mattermost/mattermost/server/v8 | >= 9.0.0, < 9.4.0 | 9.4.0 |
Details
As written in the advisory (Markdown source, shown as plain text).
Mattermost version 8.1.x before 8.1.9 fails to sanitize data associated with permalinks when a plugin updates an ephemeral post, allowing an authenticated attacker who can control the ephemeral post update to access individual posts' contents in channels they are not a member of.
References
External links from the advisory. They lead to third-party sites.