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VULNERABILITIES

CVE-2026-22880 Details

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

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:6.1 MEDIUMVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

References to Advisories, Solutions, and Tools

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URLSource(s)Tag(s)
https://mattermost.com/security-updates [email protected]Vendor Advisory

Weakness Enumeration

CWE-IDCWE NameSource
CWE-352Cross-Site Request Forgery (CSRF)[email protected]

Affected Products

ProductVersions
mattermost mattermost mobile
< 2.37.1

CPE

  • cpe:2.3:a:mattermost:mattermost_mobile:*:*:*:*:*:*:*:*

Remediation

  • No remediation found in references.

Change History

5 change records found show changes

QUICK INFO

CVE Dictionary Entry:
CVE-2026-22880
NVD Published Date:
May 21, 2026
NVD Last Modified:
Aug 6, 2026
Source:
[email protected]
CVE-2026-22880 Details - Not Deferred