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Status published
Low
CVE-2024-39807
Channel IDs of archived/restored channels leaked via webhook events
Vulnerability Description
Mattermost versions 9.5.x <= 9.5.5 and 9.8.0 fail to properly sanitize the recipients of a webhook event which allows an attacker monitoring webhook events to retrieve the channel IDs of archived or restored channels.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
The following person or organization is credited with identifying this vulnerability, as recorded in the NVD database:
- Harrison Healey
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Affected Vendor
Mattermost
View all reports →Affected Software
Mattermost
Vulnerable Versions:
9.8.0, 9.5.0, 9.9.0, 9.8.1, 9.5.6
Timeline
Official Publish:
July 3rd, 2024
Last Modified:
August 2nd, 2024
Added to House:
July 22nd, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N