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CVE-2024-36492

Existing local user overwritten by malicious remote

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 disallow the modification of local users when syncing users in shared channels. which allows a malicious remote to overwrite an existing local user.

CVSS 3.1 · 7.4 High EPSS < 1% KEV · Not listed
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Mattermost
Products
Mattermost
CVE-2024-39274

Malicious remote can add users to arbitrary teams and channels

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

CVSS 3.1 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost
CVE-2024-39777

Malicious remote can invite itself to an arbitrary local channel

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 disallow unsolicited invites to expose access to local channels, when shared channels are enabled, which allows a malicious remote to send an invite with the ID of an existing local channel, and that local channel will then become shared without the consent of the local admin.

CVSS 3.1 · 8.7 High EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost
CVE-2024-39832

Permanently local data deletion by malicious remote

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 safeguard an error handling which allows a malicious remote to permanently delete local data by abusing dangerous error handling, when share channels were enabled.

CVSS 3.1 · 6.8 Medium EPSS < 1% KEV · Not listed
Vendors
Mattermost
Products
Mattermost