CVE-2025-58075 - CVE House
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Status published High CVE-2025-58075

Arbitrary Mattermost Team can be joined by manipulating the SAML RelayState

Vulnerability Description

Mattermost versions 10.11.x <= 10.11.1, 10.10.x <= 10.10.2, 10.5.x <= 10.5.10 fail to verify a user has permission to join a Mattermost team using the original invite token which allows any attacked to join any team on a Mattermost server regardless of restrictions via manipulating the RelayState

Impact Analysis

Refer to official advisory for detailed impact metrics.

Remediation

Ensure systems are updated to the latest vendor-supplied patch levels.

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Credits & Attribution

The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:

  • DoyenSec

References

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Affected Vendor

Affected Software

Mattermost
Vulnerable Versions:
10.11.0, 10.10.0, 10.5.0, 10.12.0, 10.11.2, 10.10.3, 10.5.11

Timeline

Official Publish: October 16th, 2025
Last Modified: February 26th, 2026
Added to House: July 22nd, 2026

CVSS Vectors

V3: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Weaknesses (CWE)

CWE-862

MITRE ATT&CK TTPs

T1190 Exploit Public-Facing Application
Initial Access
T1068 Exploitation for Privilege Escalation
Privilege Escalation
T1078 Valid Accounts
Persistence
T1531 Account Access Removal
Impact