Description
A SSRF vulnerability found that enables access to internal Chrome Devtools Protocol APIs that can leak the JWT authentication token for another user. A low privileged attacker could continually exploit this vulnerability to leak the JWT authentication token for another user when they start a recording, which then enables the attacker read/write access to the victim's Whiteboard.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Nextcloud | whiteboard | 1.0.0 – < 1.0.0 | 1.0.0 |
Advisories 1
- WID-SEC-2026-4185 Nextcloud (Server, Tables, Whiteboard, Files Confidential, Collectives, Richdocuments): Mehrere Schwachstellen BSI CERT-Bund (WID) · Oct 27, 2026