CVE-2017-0893: Nextcloud Server

Medium severity, CVSS 5.4. EPSS: 0.6% chance of exploitation in the next 30 days.

Nextcloud Server before 9.0.58 and 10.0.5 and 11.0.3 are shipping a vulnerable JavaScript library for sanitizing untrusted user-input which suffered from a XSS vulnerability caused by a behaviour change in Safari 10.1 and 10.2. Note that Nextcloud employs a strict Content-Security-Policy preventing exploitation of this XSS issue on modern web browsers.

Affected products

• Nextcloud Nextcloud Server: before 9.0.58 (fixed in 9.0.58); from 10.0.0, before 10.0.5 (fixed in 10.0.5); from 11.0.0, before 11.0.3 (fixed in 11.0.3)

Published 2017-05-08. Last modified 2026-06-17.