2.7

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2024-4198

GHSA ID

GHSA-5qx9-9ffj-5r8f

EPSS Score

0.33937%

CWE

CWE-284

Published

4/26/2024

Updated

4/26/2024

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-2024-4198

CVE-2024-4198: Mattermost fails to fully validate role changes

Mattermost versions 9.6.0, 9.5.x before 9.5.3, and 8.1.x before 8.1.12 fail to fully validate role changes which allows an attacker authenticated as team admin to demote users to guest via crafted HTTP requests.

(GitHub Advisory)

Miggo Vulnerability Database

→

CVE-2024-4198

CVE-2024-4198:

2.7

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2024-4198

GHSA ID

GHSA-5qx9-9ffj-5r8f

EPSS Score

0.33937%

CWE

CWE-284

Published

4/26/2024

Updated

4/26/2024

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:N/I:L/A:N

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/mattermost/mattermost-server	go	>= 9.6.0-rc1, <= 9.6.0	9.6.1
github.com/mattermost/mattermost-server	go	>= 9.5.0, <= 9.5.2	9.5.3
github.com/mattermost/mattermost-server	go	>= 8.1.0, <= 8.1.11	8.1.12

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from improper access control in role validation. The commit diff shows critical changes in UpdateTeamMemberSchemeRoles where:

Previous checks for guest+user and guest+admin conflicts were removed
A new check rejecting ANY SchemeGuest assignment was added
Error messages were updated to indicate guest role changes require system admin
Test cases were added to verify blocking guest role changes via team API This function was the entry point for team member role updates and lacked proper authorization checks for guest role assignments, allowing team admins to bypass intended restrictions.

Vulnerable functions

Only Mi**o us*rs **n s** t*is s**tion

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.

2.7

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2024-4198: Mattermost fails to fully validate role changes

CVE-2024-4198:

2.7

-

Basic Information

Basic Information

Technical Details

Technical Details

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Vulnerability IntelligenceMiggo AI

CVE-2024-4198: Mattermost fails to fully validate role changes

2.7

2.7

Basic Information

Basic Information

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

Technical Details

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI