4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2024-4182

GHSA ID

GHSA-8f99-g2pj-x8w3

EPSS Score

0.41743%

CWE

CWE-754

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

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CVE-2024-4182

CVE-2024-4182: Mattermost crashes web clients via a malformed custom status

Mattermost versions 9.6.0, 9.5.x before 9.5.3, 9.4.x before 9.4.5, and 8.1.x before 8.1.12 fail to handle JSON parsing errors in custom status values, which allows an authenticated attacker to crash other users' web clients via a malformed custom status.

(GitHub Advisory)

Miggo Vulnerability Database

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CVE-2024-4182

CVE-2024-4182:

4.3

CVSS Score

3.1

-

CVSS Score

Basic Information

CVE ID

CVE-2024-4182

GHSA ID

GHSA-8f99-g2pj-x8w3

EPSS Score

0.41743%

CWE

CWE-754

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:L/UI:N/S:U/C:N/I:N/A:L

Package Name	Ecosystem	Vulnerable Versions	First Patched Version
github.com/mattermost/mattermost-server	go	>= 8.1.0, <= 8.1.11	8.1.12
github.com/mattermost/mattermost-server	go	>= 9.4.0, <= 9.4.4	9.4.5
github.com/mattermost/mattermost-server	go	>= 9.5.0, <= 9.5.2	9.5.3
github.com/mattermost/mattermost-server	go	>= 9.6.0-rc1, <= 9.6.0	9.6.1

Technical Details

Vulnerability Intelligence
Miggo AI

Root Cause Analysis

The vulnerability stems from two key gaps:

User.IsValid in user.go failed to validate custom status data integrity before persistence. The patch added ValidateCustomStatus() checks here to reject invalid JSON.
The webapp selector in custom_status.ts used JSON.parse without try-catch blocks. The patch added error handling to prevent crashes when parsing corrupted data. Both functions directly contributed to the improper handling of exceptional conditions (CWE-754).

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.

4.3

-

Basic Information

Basic Information

Concerned about an active attack path?

CVE-2024-4182: Mattermost crashes web clients via a malformed custom status

CVE-2024-4182:

4.3

-

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

Basic Information

Basic Information

Vulnerability IntelligenceMiggo AI

Root Cause Analysis

Vulnerable functions

WAF Protection Rules

WAF Rule

Reasoning

4.3

4.3

Technical Details

CVE-2024-4182: Mattermost crashes web clients via a malformed custom status

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI

Vulnerability Intelligence
Miggo AI