CVE-2024-39807

Channel IDs of archived/restored channels leaked via webhook events

Published Jul 3, 2024 CVSS 3.1 · 3.1 Low EPSS < 1% KEV · Not listed
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.

Remediation

Vendor Solution

Update Mattermost to versions 9.9.0, 9.8.1, 9.5.6 or higher.

Tracking

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Advisories

Source ID Title
EUVD EUVD EUVD-2024-38239 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.
References
History

No history.

Weaknesses

Sources

Status
PUBLISHED
Assigner
Mattermost
Published
Updated
Aug 2, 2024, 4:26 AM
Reserved
Jul 1, 2024, 10:22 AM
Status
Modified
Published
Jul 3, 2024, 9:15 AM
Modified
Jun 17, 2026, 7:42 AM