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.
| Package (Ecosystem) | Introduced | Fixed | Limit |
|---|---|---|---|
| github.com/mattermost/mattermost/server/v8(Go) | 8.0.0-20250721062209-4952acea88ce | 8.0.0-20251016131338-dad6bd7a1509 | N/A |
| github.com/mattermost/mattermost(Go) | 10.11.0-rc1 | 10.11.5-0.20251016131338-dad6bd7a1509 | N/A |
| github.com/mattermost/mattermost(Go) | 11.0.0-alpha.1 | 11.1.0 | N/A |
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