Description
Url redirection to untrusted site ('open redirect') in Microsoft 365 Copilot's Business Chat allows an unauthorized attacker to elevate privileges over a network.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Microsoft | Microsoft 365 Copilot | - | — |
Advisories 2
- WID-SEC-2026-2020 Microsoft 365 Copilot: Mehrere Schwachstellen BSI CERT-Bund (WID) · Jun 21, 2026
- MSRC-CVE-2026-47645 Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability Microsoft Security Response Center · Jun 18, 2026
References
- Microsoft 365 Copilot's Business Chat Elevation of Privilege Vulnerability vendor-advisory patch