CVE-2024-39807

MediumCVSS 5.3/10Last modified Jun 17, 2026

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.

Metrics

CVSS 3.1 5.3/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Weakness enumeration

CWE-200

Affected software

Vendor	Product	Versions
Mattermost	Mattermost	9.8.0; >= 9.5.0, <= 9.5.5

References

https://mattermost.com/security-updatesVendor Advisory
https://mattermost.com/security-updatesVendor Advisory

Timeline

Published: Jul 3, 2024
Last modified: Jun 17, 2026
NVD status: Modified

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