CVE-2024-39274

MediumCVSS 6.5/10Last modified Jun 17, 2026

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 properly validate that the channel that comes from the sync message is a shared channel, when shared channels are enabled, which allows a malicious remote to add users to arbitrary teams and channels

Metrics

CVSS 3.1 6.5/10CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N

Weakness enumeration

CWE-284

Affected software

VendorProductVersions
MattermostMattermost9.9.0; >= 9.5.0, <= 9.5.6; >= 9.7.0, <= 9.7.5; >= 9.8.0, <= 9.8.1
mattermostmattermost9.9.0
mattermostmattermost>= 9.5.0, <= 9.5.6; >= 9.7.0, <= 9.7.5; >= 9.8.0, <= 9.8.1
mattermostmattermost9.10.0
mattermostmattermost9.9.1
mattermostmattermost9.5.7
mattermostmattermost9.7.6
mattermostmattermost9.8.2

References

Timeline

Published
Aug 1, 2024
Last modified
Jun 17, 2026
NVD status
Analyzed

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CVE-2024-39274: Medium severity, CVSS 6.5 | Vulnix