CVE-2025-49222

Description

Mattermost Fails to Validate Remote Cluster Upload Sessions in github.com/mattermost/mattermost-server. NOTE: The source advisory for this report contains additional versions that could not be automatically mapped to standard Go module versions. (If this is causing false-positive reports from vulnerability scanners, please suggest an edit to the report.) The additional affected modules and versions are: github.com/mattermost/mattermost/server/v8 before v8.0.0-20250708173752-d6b35c41f0ae5.

How to fix CVE-2025-49222

To remediate CVE-2025-49222, upgrade the affected package to a fixed version below.

—upgrade to 10.8.4 or later
—upgrade to 9.11.18+incompatible or later
—no fix listed
—no fix listed
—no fix listed
—no fix listed
—upgrade to 8.0.0-20250708173752-d6b35c41f0ae5 or later
—no fix listed

Is CVE-2025-49222 being exploited?

Low — EPSS is 0.1%, meaning exploitation activity has not been observed at scale.

Affected packages (8)

>= 10.8.0, < 10.8.4
>= 9.11.0+incompatible, < 9.11.18+incompatible, >= 10.5.0+incompatible, < 10.5.9+incompatible, >= 10.8.0+incompatible, < 10.8.4+incompatible, >= 10.9.0+incompatible, < 10.9.3+incompatible, >= 10.10.0+incompatible, < 10.10.1+incompatible
from 0
from 0, <= 5.39.3
from 0, <= 5.7.2
from 0
from 0, < 8.0.0-20250708173752-d6b35c41f0ae5
from 0

CVSS scores

Source	Version	Severity	Vector
osv	CVSS 3.1	MEDIUM6.8	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:N/A:N