CVE-2026-22880 (GCVE-0-2026-22880)

Vulnerability from cvelistv5 – Published: 2026-05-21 08:22 – Updated: 2026-05-21 12:39
VLAI
Title
Mobile SSO authentication flow allows credential theft via malicious server
Summary
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-05-21 12:39 UTC
CWE
  • CWE-352 - Cross-Site Request Forgery (CSRF)
Assigner
Mattermost CNA under the mitre root
CNA scorecard B 80/100 over 123 records in the last 180 days details
References
URL Tags
https://mattermost.com/security-updates vendor-advisory
Impacted products
Vendor Product Version CPE status
Mattermost Mattermost Affected: 0 , ≤ 2.0.37 (semver)
Affected: 0 , ≤ 11.0.4 (semver)
Affected: 0 , ≤ 11.1.3 (semver)
Affected: 0 , ≤ 11.3.2 (semver)
Affected: 0 , ≤ 10.11.11 (semver)
Unaffected: 2.38.0
Unaffected: 11.5.0
Unaffected: 2.37.1.0
Unaffected: 11.4.1
Unaffected: 11.3.2
Unaffected: 11.2.4
Unaffected: 10.11.12
guessed Create a notification for this product.
Credits
Show details on NVD website

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