Medium severity4.3NVD Advisory· Published Aug 1, 2024· Updated Jun 17, 2026
CVE-2024-39839
CVE-2024-39839
Description
Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to disallow users to set their own remote username, when shared channels were enabled, which allows a user on a remote to set their remote username prop to an arbitrary string, which would be then synced to the local server as long as the user hadn't been synced before.
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Affected packages
Versions sourced from the GitHub Security Advisory.
| Package | Affected versions | Patched versions |
|---|---|---|
github.com/mattermost/mattermost/server/v8Go | >= 9.5.0, < 9.5.7 | 9.5.7 |
github.com/mattermost/mattermost/server/v8Go | >= 9.7.0, < 9.7.6 | 9.7.6 |
github.com/mattermost/mattermost/server/v8Go | >= 9.8.0, < 9.8.2 | 9.8.2 |
github.com/mattermost/mattermost/server/v8Go | >= 9.9.0, < 9.9.1 | 9.9.1 |
Affected products
59.9.0+ 2 more
- (no CPE)range: 9.9.0
- cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*range: >=9.5.0,<9.5.7
- cpe:2.3:a:mattermost:mattermost_server:9.9.0:*:*:*:*:*:*:*
- osv-coords2 versions
>= 9.5.0, < 9.5.7+ 1 more
- (no CPE)range: >= 9.5.0, < 9.5.7
- (no CPE)range: >= 9.5.0, < 9.5.7
Patches
Vulnerability mechanics
References
4- github.com/advisories/GHSA-vg6q-84p8-qvqhghsaADVISORY
- mattermost.com/security-updatesnvdVendor AdvisoryWEB
- nvd.nist.gov/vuln/detail/CVE-2024-39839ghsaADVISORY
- pkg.go.dev/vuln/GO-2024-3024ghsaWEB
News mentions
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