CVE-2024-39777 HIGH

CVE-2024-39777: Malicious remote can invite itself to an arbitrary local channel

Vendor Mattermost
Product Mattermost
Weakness CWE-284
Published August 1, 2024
Last update August 1, 2024
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required High
User interaction None
Confidentiality High
Integrity High

CVSS vector

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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

August 1, 2024 CVE published
August 1, 2024 Record updated