6.1

CVE-2026-22880

Mobile SSO authentication flow allows credential theft via malicious server

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
Daten sind bereitgestellt durch das CVE Programm von einer CVE Numbering Authority (CNA) (Unstrukturiert).
HerstellerMattermost
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Produkt Mattermost
Default Statusunaffected
Version <= 2.0.37
Version 0
Status affected
Version <= 11.0.4
Version 0
Status affected
Version <= 11.1.3
Version 0
Status affected
Version <= 11.3.2
Version 0
Status affected
Version <= 10.11.11
Version 0
Status affected
Version 2.38.0
Status unaffected
Version 11.5.0
Status unaffected
Version 2.37.1.0
Status unaffected
Version 11.4.1
Status unaffected
Version 11.3.2
Status unaffected
Version 11.2.4
Status unaffected
Version 10.11.12
Status unaffected
VulnDex Vulnerability Enrichment
Diese Information steht angemeldeten Benutzern zur Verfügung. Login Login
Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.12% 0.02
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
responsibledisclosure@mattermost.com 6.1 1.6 4
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N
CWE-352 Cross-Site Request Forgery (CSRF)

The web application does not, or cannot, sufficiently verify whether a request was intentionally provided by the user who sent the request, which could have originated from an unauthorized actor.

https://mattermost.com/security-updates