CVE-2020-8155: Nextcloud Server

Medium severity, CVSS 5.4. EPSS: 1.1% chance of exploitation in the next 30 days.

An outdated 3rd party library in the Files PDF viewer for Nextcloud Server 18.0.2 caused a Cross-site scripting vulnerability when opening a malicious PDF.

Affected products

• Nextcloud Nextcloud Server: before 18.0.3 (fixed in 18.0.3)

Published 2020-05-12. Last modified 2026-06-17.