CVE-2017-0891: 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 vulnerable to an inadequate escaping of error messages leading to XSS vulnerabilities in multiple components.

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.