CVE-2024-39274

unknown

Published 2024-08-01 · Modified 2026-03-03

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CVSS v3

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

CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

Mattermost failed to properly validate that the channel that comes from the sync message is a shared channel in github.com/mattermost/mattermost-server

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

✚ Propose a mitigation on Community → Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
Go	github.com/mattermost/mattermost/server/v8	`>=9.5.0,<9.5.7`	`9.5.7`
Go	github.com/mattermost/mattermost/server/v8	`>=9.7.0,<9.7.6`	`9.7.6`
Go	github.com/mattermost/mattermost/server/v8	`>=9.8.0,<9.8.2`	`9.8.2`
Go	github.com/mattermost/mattermost/server/v8	`>=9.9.0,<9.9.1`	`9.9.1`
Go	github.com/mattermost/mattermost-server	`>=9.9.0+incompatible,<9.9.1+incompatible`	`9.5.7+incompatible`
Go	github.com/mattermost/mattermost-server/v5
Go	github.com/mattermost/mattermost-server/v6
Go	github.com/mattermost/mattermost/server/v8

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.