CVE-2020-8189: Nextcloud Desktop

Medium severity, CVSS 5.4. EPSS: 1.4% chance of exploitation in the next 30 days.

A cross-site scripting error in Nextcloud Desktop client 2.6.4 allowed to present any html (including local links) when responding with invalid data on the login attempt.

Affected products

• Nextcloud Desktop: before 2.6.5 (fixed in 2.6.5)

Published 2020-08-21. Last modified 2026-06-17.