CSIRTS // UNIFIED SECURITY ADVISORY FEEDSYS ● ONLINE · POWERED BY INTELFUSIONS.COM

[NEW] [medium] Mattermost: Multiple vulnerabilities allow unspecified attack

medium
A remote, anonymous attacker can exploit multiple vulnerabilities in Mattermost to carry out an unspecified attack.

CSIRTS triage

What
Multiple vulnerabilities allow unspecified attacks against Mattermost.
Who is affected
Remote, anonymous users of Mattermost are affected.
Urgency
Remediation is important as multiple vulnerabilities exist, though specific exploitation details are not provided.
Action
Monitor for updates from Mattermost regarding these vulnerabilities.

AI-assisted analysis generated from the source advisory — verify against the original.

⚡ Watch Mattermost

Get an email when a new Mattermost advisory drops — max one per day, one-click unsubscribe.

Details

Source
CERT-Bund (BSI) Security Advisories (DE · national-cert · site)
Severity
medium
Published
2026-07-20
Exploitation
Not in CISA KEV at last sync
Language
Machine-translated to English — verify against the original

Original advisory: https://wid.cert-bund.de/portal/wid/securityadvisory?name=WID-SEC-2026-2411

Recent advisories for Mattermost

A cluster of recent advisories against the same product widens the attack surface — attackers routinely chain freshly published CVEs on one product, so review these together.

More from CERT-Bund (BSI) Security Advisories