CVE-2025-41410
Medium
Description
Mattermost versions 10.10.x <= 10.10.2, 10.5.x <= 10.5.10, 10.11.x <= 10.11.2 fail to validate email ownership during Slack import process which allows attackers to create verified user accounts with arbitrary email domains via malicious Slack import data to bypass email-based team access restrictions
SeverityMedium
CVSS5.4
Exploit probability—
Product
Mattermost Server
PublishedOct 16, 2025
First seenOct 16, 2025
Weakness typeCWE-862Missing authorization
How to fix
Update
- mattermost mattermost_server10.5.11, 10.10.3, 10.11.3 or later
- github.com/mattermost/mattermost/server/v88.0.0-20250822083415-01b95392a450 or later
- github.com/mattermost/mattermost-server10.10.3, 10.5.11, 10.11.3, 10.5.11+incompatible, 10.10.3+incompatible, 10.11.3+incompatible or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.5.0 ≤ v < 10.5.11, 10.10.0 ≤ v < 10.10.3, 10.11.0 ≤ v < 10.11.3 | 10.5.11, 10.10.3, 10.11.3 |
| github.com/mattermost/mattermost/server/v8Go | v < 8.0.0-20250822083415-01b95392a450, No range specified | 8.0.0-20250822083415-01b95392a450 |
| github.com/mattermost/mattermost-serverGo | 10.10.0 ≤ v < 10.10.3, 10.5.0 ≤ v < 10.5.11, 10.11.0 ≤ v < 10.11.3, 10.5.0+incompatible ≤ v < 10.5.11+incompatible, 10.10.0+incompatible ≤ v < 10.10.3+incompatible, 10.11.0+incompatible ≤ v < 10.11.3+incompatible | 10.10.3, 10.5.11, 10.11.3, 10.5.11+incompatible, 10.10.3+incompatible, 10.11.3+incompatible |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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