CVE-2025-62690
Low
Description
Mattermost versions 10.11.x <= 10.11.4 fail to validate redirect URLs on the /error page, which allows an attacker to redirect a victim to a malicious site via a crafted link opened in a new tab.
SeverityLow
CVSS3.1
Exploit probability—
Product
Mattermost Server
PublishedDec 17, 2025
First seenDec 17, 2025
Weakness typeCWE-601Open redirect
How to fix
Update
- mattermost mattermost_server10.11.5 or later
- github.com/mattermost/mattermost/server/v88.0.0-20251016131338-dad6bd7a1509 or later
- github.com/mattermost/mattermost10.11.5-0.20251016131338-dad6bd7a1509, 11.1.0, 11.1.0+incompatible or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| mattermost mattermost_server | 10.11.0 ≤ v < 10.11.5 | 10.11.5 |
| github.com/mattermost/mattermost/server/v8Go | 8.0.0-20250721062209-4952acea88ce ≤ v < 8.0.0-20251016131338-dad6bd7a1509 | 8.0.0-20251016131338-dad6bd7a1509 |
| github.com/mattermost/mattermostGo | 10.11.0-rc1 ≤ v < 10.11.5-0.20251016131338-dad6bd7a1509, 11.0.0-alpha.1 ≤ v < 11.1.0, 10.11.0-rc1+incompatible ≤ v < 11.1.0+incompatible | 10.11.5-0.20251016131338-dad6bd7a1509, 11.1.0, 11.1.0+incompatible |
| github.com/mattermost/mattermost-serverGo | No range specified | — |
| github.com/mattermost/mattermost-server/v5Go | No range specified | — |
| github.com/mattermost/mattermost-server/v6Go | No range specified | — |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.