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CVE-2026-22880

Mobile SSO authentication flow allows credential theft via malicious server PUBLISHED

Description (CNA)

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

Affected (CNA)

Vendor / productVersions
Mattermost / Mattermostaffected 0 through 2.0.37; affected 0 through 11.0.4; affected 0 through 11.1.3; affected 0 through 11.3.2; affected 0 through 10.11.11; 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

CWE

CWE-352

References

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.