CVE-2025-59788
Medium
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.
SeverityMedium
CVSS6.4
Exploit probability—
Product
Nextcloud Server
PublishedDec 4, 2025
First seenDec 4, 2025
Weakness typeCWE-749CWE-749
How to fix
Update
- nextcloud nextcloud_server30.0.17, 31.0.10, 32.0.1, 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 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| nextcloud nextcloud_server | 30.0.0 ≤ v < 30.0.17, 31.0.0 ≤ v < 31.0.10, 32.0.0 ≤ v < 32.0.1, 22.0.0 ≤ v < 22.2.10.33, 23.0.0 ≤ v < 23.0.12.29, 24.0.0 ≤ v < 24.0.12.28, 25.0.0 ≤ v < 25.0.13.23, 26.0.0 ≤ v < 26.0.13.20, 27.0.0 ≤ v < 27.1.11.20, 28.0.0 ≤ v < 28.0.14.11, 29.0.0 ≤ v < 29.0.16.8 | 30.0.17, 31.0.10, 32.0.1, 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 |
Check your version
Choose the product and enter the version you run to see whether it falls in the affected range.
In the Intelligence 360 plan
Attack Surface Management
See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.