Description
Cross-site scripting (XSS) vulnerability in a reachable files_pdfviewer example directory in Nextcloud with versions before 22.2.10.33, 23.0.12.29, 24.0.12.28, 25.0.13.23, 26.0.13.20, 27.1.11.20, 28.0.14.11, 29.0.16.8, 30.0.17, 31.0.10, and 32.0.1 allows attackers to execute arbitrary JavaScript in the context of a user's browser via a crafted PDF file to viewer.html. This issue is related to CVE-2024-4367, but the root cause of this Nextcloud issue is that the product exposes executable example code on a same-origin basis.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| Nextcloud | Nextcloud | < 22.2.10.33, 23 – < 23.0.12.29, 24 – < 24.0.12.28, 25 – < 25.0.13.23, 26 – < 26.0.13.20, 27 – < 27.1.11.20, 28 – < 28.0.14.11, 29 – < 29.0.16.8, 30 – < 30.0.17, 31 – < 31.0.10, 32 – < 32.0.1 | 22.2.10.33 |
Advisories 1
- WID-SEC-2025-2739 Nextcloud: Schwachstelle ermöglicht Cross-Site Scripting BSI CERT-Bund (WID) · Dec 4, 2025