Medium · published December 5, 2025
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.
| Product | Versions | Fixed in |
|---|---|---|
| nextcloud/nextcloud_server | ≥ 30.0.0, < 30.0.17 | 30.0.17 |
| nextcloud/nextcloud_server | ≥ 31.0.0, < 31.0.10 | 31.0.10 |
| nextcloud/nextcloud_server | ≥ 32.0.0, < 32.0.1 | 32.0.1 |
| nextcloud/nextcloud_server | ≥ 22.0.0, < 22.2.10.33 | 22.2.10.33 |
| nextcloud/nextcloud_server | ≥ 23.0.0, < 23.0.12.29 | 23.0.12.29 |
| nextcloud/nextcloud_server | ≥ 24.0.0, < 24.0.12.28 | 24.0.12.28 |
| nextcloud/nextcloud_server | ≥ 25.0.0, < 25.0.13.23 | 25.0.13.23 |
| nextcloud/nextcloud_server | ≥ 26.0.0, < 26.0.13.20 | 26.0.13.20 |
| nextcloud/nextcloud_server | ≥ 27.0.0, < 27.1.11.20 | 27.1.11.20 |
| nextcloud/nextcloud_server | ≥ 28.0.0, < 28.0.14.11 | 28.0.14.11 |
| nextcloud/nextcloud_server | ≥ 29.0.0, < 29.0.16.8 | 29.0.16.8 |
| nextcloud/nextcloud_server | ≥ 30.0.0, < 30.0.17 | 30.0.17 |
| nextcloud/nextcloud_server | ≥ 31.0.0, < 31.0.10 | 31.0.10 |
| nextcloud/nextcloud_server | ≥ 32.0.0, < 32.0.1 | 32.0.1 |