Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2025-3227
CVE-2025-3227:
vulnerability analysis and mitigation
Overview
Mattermost versions 10.5.x <= 10.5.5, 9.11.x <= 9.11.15, 10.8.x <= 10.8.0, 10.7.x <= 10.7.2, and 10.6.x <= 10.6.5 contain a permission enforcement vulnerability discovered and disclosed on June 20, 2025. The vulnerability affects the channel member management permissions system in playbook runs functionality (NVD, AttackerKB).
Technical details
The vulnerability stems from improper enforcement of channel member management permissions in playbook runs. When a playbook run is linked to a channel, authenticated users without the 'Manage Channel Members' permission can bypass restrictions to add or remove users from both public and private channels by manipulating playbook run participants. The vulnerability has been assigned a CVSS v3.1 base score of 4.3 (Medium) with vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N, indicating network accessibility with low attack complexity and requiring low privileges (NVD).
Impact
The vulnerability allows authenticated attackers to bypass channel membership controls, potentially leading to unauthorized access management in both public and private channels. This could result in unauthorized users being added to or removed from channels, compromising channel access controls (NVD).
Mitigation and workarounds
Organizations should upgrade to the latest version of Mattermost that addresses this vulnerability. The issue has been fixed in versions newer than 10.5.5, 9.11.15, 10.8.0, 10.7.2, and 10.6.5 for their respective release branches (Mattermost Security Updates).
Additional resources
Source: This report was generated using AI
Free Vulnerability Assessment
Benchmark your Cloud Security Posture
Evaluate your cloud security practices across 9 security domains to benchmark your risk level and identify gaps in your defenses.
Get a personalized demo
Ready to see Wiz in action?
“Best User Experience I have ever seen, provides full visibility to cloud workloads.”
David EstlickCISO
“Wiz provides a single pane of glass to see what is going on in our cloud environments.”
Adam FletcherChief Security Officer
“We know that if Wiz identifies something as critical, it actually is.”
Greg PoniatowskiHead of Threat and Vulnerability Management