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.
Details
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N
Affected Packages
| Software | From version | Fixed in |
|---|---|---|
| github.com/mattermost/mattermost | โ | โ |
| github.com/mattermost/mattermost-server | โ | โ |
| github.com/mattermost/mattermost-server/v5 | โ | โ |
| github.com/mattermost/mattermost-server/v6 | โ | โ |
| github.com/mattermost/mattermost/server/v8 | โ | โ |
| mattermost-server | 10.11.0 | 10.11.5 |
References
Similar Threats
- High CVE-2026-6347
- Medium CVE-2026-2461
- High CVE-2025-13523
- Medium CVE-2025-12689
- Low CVE-2025-13324
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