CVE-2025-58084

Mattermost Desktop App crashes when clicking on malformed external URL

CVSS 3.5 LOWEPSS 0.3%CWE-1287

Vexday Risk Score

8Low

SSVC decision (CISA)

Track

No exploitation signal → monitor

CVSS 3.5EPSS 0.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Lifecycle

13 Oct 2025Published on NVD

Recommendation: Monitor — no exploitation signal at the moment.

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.

CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L

Affected products

Mattermost · Mattermost

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References

https://mattermost.com/security-updates