CVE-2018-3780: Nextcloud Server

Medium severity, CVSS 5.4. EPSS: 0.9% chance of exploitation in the next 30 days.

A missing sanitization of search results for an autocomplete field in NextCloud Server <13.0.5 could lead to a stored XSS requiring user-interaction. The missing sanitization only affected user names, hence malicious search results could only be crafted by authenticated users.

Affected products

• Nextcloud Nextcloud Server: before 13.0.5 (fixed in 13.0.5)

Published 2018-08-13. Last modified 2026-06-17.