CVE-2024-41144: Malicious remote can create/update/delete arbitrary posts in arbitrary channels

First published: Thu Aug 01 2024(Updated: )

Mattermost versions 9.9.x <= 9.9.0, 9.5.x <= 9.5.6, 9.7.x <= 9.7.5, 9.8.x <= 9.8.1 fail to properly validate synced posts, when shared channels are enabled, which allows a malicious remote to create/update/delete arbitrary posts in arbitrary channels

Credit: responsibledisclosure@mattermost.com responsibledisclosure@mattermost.com

Affected Software	Affected Version	How to fix
go/github.com/mattermost/mattermost/server/v8	=9.9.0	9.9.1
go/github.com/mattermost/mattermost/server/v8	>=9.8.0<9.8.2	9.8.2
go/github.com/mattermost/mattermost/server/v8	>=9.7.0<9.7.6	9.7.6
go/github.com/mattermost/mattermost/server/v8	>=9.5.0<9.5.7	9.5.7
Mattermost Mattermost Server	>=9.5.0<9.5.7
Mattermost Mattermost Server	>=9.7.0<9.7.6
Mattermost Mattermost Server	>=9.8.0<9.8.2
Mattermost Mattermost Server	=9.9.0
	>=9.5.0<9.5.7
	>=9.7.0<9.7.6
	>=9.8.0<9.8.2
	=9.9.0

Remedy

Update Mattermost to versions 9.10.0, 9.9.1, 9.5.7, 9.7.6, 9.8.2 or higher.

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