Description
Mattermost Desktop App versions <= 5.13.0 fail to validate URLs external to the configured Mattermost servers, allowing an attacker on a server the user has configured to crash the user's application by sending the user a malformed URL.
Metrics
CVSS 3.1 6.5/10
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HWeakness enumeration
Affected software
| Vendor | Product | Versions |
|---|---|---|
| Mattermost | Mattermost | <= 5.13.0 |
References
- https://mattermost.com/security-updatesVendor Advisory
Timeline
- Published
- Oct 13, 2025
- Last modified
- Oct 19, 2026
- NVD status
- Analyzed