CVE-2024-41926: Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a…

PriorityP424medium4.3CVSS 3.1

AVNACLPRLUINSUCNILAN

EPSS

0.18%

7.2th percentile

Mattermost versions 9.9.x <= 9.9.0 and 9.5.x <= 9.5.6 fail to validate the source of sync messages and only allow the correct remote IDs, which allows a malicious remote to set arbitrary RemoteId values for synced users and therefore claim that a user was synced from another remote.

Affected

10 ranges

Vendor	Product	Version range	Fixed in
github.com	mattermost_mattermost	>= 0 < 5.3.2-0.20240604093018-5114c3b7cdb8	5.3.2-0.20240604093018-5114c3b7cdb8
github.com	mattermost_mattermost-server	>= 9.5.0+incompatible < 9.5.7+incompatible	9.5.7+incompatible
github.com	mattermost_mattermost-server	>= 9.9.0+incompatible < 9.9.1+incompatible	9.9.1+incompatible
github.com	mattermost_mattermost_server_v8	>= 0 < 8.0.0-20240604093018-5114c3b7cdb8	8.0.0-20240604093018-5114c3b7cdb8
github.com	mattermost_mattermost_server_v8	>= 9.5.0 < 9.5.7	9.5.7
github.com	mattermost_mattermost_server_v8	>= 9.9.0 < 9.9.1	9.9.1
mattermost	mattermost	—	—
mattermost	mattermost	9.5.0 – 9.5.6	—
mattermost	mattermost_server	—	—
mattermost	mattermost_server	>= 9.5.0 < 9.5.7	9.5.7

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