Multiple Vulnerabilities Discovered in Mattermost Server

📌 Multiple vulnerabilities were discovered in Mattermost Server on 17 March 2026, as reported by the French government’s CERT (CERT-FR). These flaws enable attackers to bypass security policies and exploit an unspecified security issue, though no technical details or CVE identifiers were provided in the notice. The affected product is Mattermost Server, a collaboration platform, but the exact versions impacted were not disclosed. The vulnerabilities were identified without further elaboration on attack vectors or exploitation methods. No mitigation steps or patches were mentioned in the advisory.