CVE-2024-39839
MEDIUM EPSS 25.7%
Published Aug 1, 20241y ago · Modified Jun 17, 20262w ago
4.3 CVSS 3.1
Published Aug 1, 2024 1y ago
Last Modified Jun 17, 2026 2w ago
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.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality None
Integrity Low
Availability None
Threat Intelligence
EPSS Exploit Probability
25.7% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-284
Affected Products 4
| Vendor | Product | Version | Range |
|---|---|---|---|
| mattermost | mattermost_server | * | ≥9.5.0 – <9.5.7 |
| mattermost | mattermost_server | * | ≥9.7.0 – <9.7.6 |
| mattermost | mattermost_server | * | ≥9.8.0 – <9.8.2 |
| mattermost | mattermost_server | 9.9.0 | any |
References 1
- mattermost.com https://mattermost.com/security-updates
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.