CVE-2025-13321 Mattermost Desktop App logging sensitive information and fails to clear data on server deletion
Attackers with local system access can read sensitive information from Mattermost Desktop App logs due to insufficient sanitization and data clearing.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Local or same network only
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2025-13321?
CVE-2025-13321 is a low-severity vulnerability in Mattermost, published on 17 Dec 2025. It can only be exploited from the same machine or local network, with no action from the victim.
Official description
Mattermost Desktop App versions <6.0.0 fail to sanitize sensitive information from Mattermost logs and clear data on server deletion which allows an attacker with access to the users system to gain access to potentially sensitive information via reading the application logs.
Weakness: CWE-532
Which versions are affected by CVE-2025-13321?
2 open source packages ship an affected version, including mattermost-desktop. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
mattermost-desktop npm | All versions to 3.6.0 | None |
mattermost-desktop npm | All versions to 3.6.0 | None |
Products include Mattermost Mattermost Desktop.
How do I fix CVE-2025-13321?
No fix has been published for CVE-2025-13321 yet. Limit exposure of the affected software until one is available.
Is CVE-2025-13321 being exploited?
There is no known exploitation of CVE-2025-13321 in the wild and no public exploit code.
Other vulnerabilities in Mattermost
Sources
Also known as GHSA-g6qx-wq5w-wr8v.