Description
Mattermost fails to normalize UTF confusable characters when determining if a preview should be generated for a hyperlink, allowing an attacker to trigger link preview on a disallowed domain using a specially crafted link.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Mattermost | Mattermost | < 7.1.9, < 7.8.4, < 7.9.3 | 7.1.9 |
Advisories 1
- WID-SEC-2023-1244 Mattermost: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jul 17, 2023