3.8

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2025-53971

GHSA ID

GHSA-4276-cm8c-788h

EPSS Score

0.04385%

CWE

CWE-863

Published

8/21/2025

Updated

8/21/2025

KEV Status

Technology

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Concerned about an active attack path?

Talk to our security experts and see Miggo in action.

Miggo Vulnerability Database

→

CVE-2025-53971

CVE-2025-53971: Mattermost Fails to Properly Validate Team Role Modification

Mattermost versions 10.5.x <= 10.5.8, 9.11.x <= 9.11.17 fail to properly validate authorization for team scheme role modifications which allows Team Admins to demote Team Members to Guests via the PUT /api/v4/teams/team-id/members/user-id/schemeRoles API endpoint.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2025-53971

CVE-2025-53971:

3.8

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2025-53971

GHSA ID

GHSA-4276-cm8c-788h

EPSS Score

0.04385%

CWE

CWE-863

Published

8/21/2025

Updated

8/21/2025

KEV Status

Technology

Basic Information

CVE ID

GHSA ID

EPSS Score

CWE

Published

Updated

KEV Status

Technology

Technical Details

CVSS Vector

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

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/mattermost/mattermost-server	go	>= 10.5.0, <= 10.5.8	10.5.9
github.com/mattermost/mattermost-server	go	>= 9.11.0, <= 9.11.17	9.11.18
github.com/mattermost/mattermost/server/v8	go	< 8.0.0-20250721095846-c602a4a78e1f	8.0.0-20250721095846-c602a4a78e1f

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis:

In progress

WAF Protection Rules

WAF Rule

W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.W** rul*s *v*il**l* *or Mi**o *ustom*rs only.

Reasoning

*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.*v*il**l* *or Mi**o *ustom*rs only.

3.8

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2025-53971: Mattermost Fails to Properly Validate Team Role Modification

CVE-2025-53971:

3.8

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

Basic Information

Basic Information

Technical Details

CVE-2025-53971: Mattermost Fails to Properly Validate Team Role Modification

3.8

3.8

Vulnerability IntelligenceMiggo AI

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI