CVE-2024-24776

Incorrect Authorization leads to Channel Member Count Leak

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Published Feb 9, 2024 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed

Description

Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/member_count API resulting in channel member counts being leaked to a user without permissions.

Affected Products

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions

Mattermost

Mattermost

unaffected

Version	Status	Constraints
`0`	affected	≤ 8.1.7
`8.1.8`	unaffected	—
`9.4.0`	affected	—

Configuration 1 [-]

cpe:2.3:a:mattermost:mattermost_server:*:*:*:*:*:*:*:*

No data.

No data available yet.

Remediation

Vendor Solution

Update Mattermost Server to versions 8.1.8, 9.4.0 or higher.

Tracking

Sign in to view the affected projects.

Advisories

Source	ID	Title
EUVD	EUVD-2024-0710	Mattermost fails to check the required permissions in the POST /api/v4/channels/stats/member_count API resulting in channel member counts being leaked to a user without permissions.
Github GHSA	GHSA-r833-w756-h5p2	Mattermost fails to check the required permissions

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact None

Availability Impact None

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Exploit prediction score: < 1% (0.314% probability within 30 days)

Key SSVC decision points have not yet been added.

References

Link	Providers
https://mattermost.com/security-updates

History

No history.

Subscriptions

Mattermost Mattermost Server

Weaknesses

Sources

CVE record Updated: Aug 1, 2024, 11:28 PM

Status: PUBLISHED
Assigner: Mattermost
Published: Feb 9, 2024, 2:50 PM
Updated: Aug 1, 2024, 11:28 PM
Reserved: Jan 30, 2024, 10:23 AM

View source JSON

Vulnrichment Updated: Aug 1, 2024, 11:28 PM

Updated: Aug 1, 2024, 11:28 PM

NVD Updated: Jun 17, 2026, 7:14 AM

Status: Modified
Published: Feb 9, 2024, 3:15 PM
Modified: Jun 17, 2026, 7:14 AM

View source JSON

Red Hat No data

No data.

OpenCVE enrichment No data

No data.

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