CVE-2025-20621
Medium
Description
Mattermost versions 10.2.x <= 10.2.0, 9.11.x <= 9.11.5, 10.0.x <= 10.0.3, 10.1.x <= 10.1.3 fail to properly handle posts with attachments containing fields that cannot be cast to a String, which allows an attacker to cause the webapp to crash via creating and sending such a post to a channel.
SeverityMedium
CVSS6.5
Exploit probability—
Product
Mattermost Server
PublishedJan 16, 2025
First seenJan 16, 2025
Weakness typeCWE-1287CWE-1287
How to fix
Update
- mattermost mattermost_server9.11.6, 10.0.4, 10.1.4 or later
- github.com/mattermost/mattermost/server/v810.2.1, 10.1.4, 10.0.4, 9.11.6, 8.0.0-20241127161322-25ff7a3779a5 or later
- github.com/mattermost/mattermost-server9.11.6+incompatible, 10.0.4+incompatible, 10.1.4+incompatible, 10.2.1+incompatible or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 9.11.0 ≤ v < 9.11.6, 10.0.0 ≤ v < 10.0.4, 10.1.0 ≤ v < 10.1.4, 10.2.0 | 9.11.6, 10.0.4, 10.1.4 |
| github.com/mattermost/mattermost/server/v8Go | 10.2.0 ≤ v < 10.2.1, 10.1.0 ≤ v < 10.1.4, 10.0.0 ≤ v < 10.0.4, 9.11.0 ≤ v < 9.11.6, v < 8.0.0-20241127161322-25ff7a3779a5 | 10.2.1, 10.1.4, 10.0.4, 9.11.6, 8.0.0-20241127161322-25ff7a3779a5 |
| github.com/mattermost/mattermost-serverGo | 9.11.0+incompatible ≤ v < 9.11.6+incompatible, 10.0.0+incompatible ≤ v < 10.0.4+incompatible, 10.1.0+incompatible ≤ v < 10.1.4+incompatible, 10.2.0+incompatible ≤ v < 10.2.1+incompatible | 9.11.6+incompatible, 10.0.4+incompatible, 10.1.4+incompatible, 10.2.1+incompatible |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
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