CVE-2021-22895: Debian Linux

Medium severity, CVSS 5.9. EPSS: 1% chance of exploitation in the next 30 days.

Nextcloud Desktop Client before 3.3.1 is vulnerable to improper certificate validation due to lack of SSL certificate verification when using the "Register with a Provider" flow.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Nextcloud Desktop: before 3.1.3 (fixed in 3.1.3)

Published 2021-06-11. Last modified 2026-06-17.