CVE-2026-22880
Published: May 21, 2026
Modified: May 21, 2026
CVSS v3.1
6.1
Description
Mattermost Mobile Apps versions <=2.37 11.4 2.0.37 11.0.4 11.1.3 11.3.2 10.11.11.0 fail to properly validate the SSO authentication callback origin which allows an attacker controlling a malicious Mattermost server to steal user credentials for a legitimate Mattermost server via relaying the SSO code exchange flow through the mobile application. Mattermost Advisory ID: MMSA-2025-00564
| Vendor | Product | Versions |
|---|---|---|
Mattermost | Mattermost | affected 0 - <= 2.0.37affected 0 - <= 11.0.4affected 0 - <= 11.1.3affected 0 - <= 11.3.2affected 0 - <= 10.11.11+7 more versions |
Weaknesses (CWE)
CVSS v3.1 Details
CVSS v3.1 Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
References
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