Is CVE-2024-39777 actively exploited?

CVE-2024-39777 has no public evidence of in-the-wild exploitation as of 2024-08-23.

What is the CVSS score for CVE-2024-39777?

CVE-2024-39777 has a CVSS score of 8.7 (HIGH severity). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N.

How do I patch CVE-2024-39777?

Patch guidance is available from mattermost security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2024-39777.

Fix CVE-2024-39777 - HIGH mattermost mattermost

Q: Which products are affected by CVE-2024-39777?

4 products: mattermost mattermost, mattermost mattermost, mattermost mattermost, mattermost mattermost.

Description

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5 and 9.8.x <= 9.8.1 fail to disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local channel will then become shared without the consent of the local admin.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:N
Attack Vector: network
Complexity: low
Privileges: high
User Action: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: none
Weaknesses: CWE-284NVD-CWE-noinfo

Metadata

Primary Vendor: MATTERMOST
Published: 8/1/2024
Last Modified: 8/23/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

mattermost : mattermostmattermost : mattermostmattermost : mattermostmattermost : mattermost

Remediation Guidance

Executive Summary

Cite this page

CVE-2024-39777. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2024-39777

View on NIST NVD

CVE-2024-39777 vulnerability