CVE-2026-22880

6.1 mediumEPSS 0.1%

Medium (6.1) in mattermost mattermost mobile. EPSS 0.1% chance of exploitation in the next 30 days.

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

Severity

CVSS 3.1

6.1 medium

CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:N/A:N

EPSS: 0.1% chance of exploitation in the next 30 days; higher than 1% of CVEs (scores of 2026-10-31)
CWE: CWE-352
Published: 2026-05-21
Modified: 2026-08-06
Record from: the NVD, synced 2026-10-19

Affected

mattermost:mattermost_mobile

References

https://mattermost.com/security-updates

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