CVE-2023-33184: Nextcloud Mail

Medium severity, CVSS 5.3. EPSS: 0.5% chance of exploitation in the next 30 days.

Nextcloud Mail is a mail app in Nextcloud. A blind SSRF attack allowed to send GET requests to services running in the same web server. It is recommended that the Mail app is update to version 3.02, 2.2.5 or 1.15.3.

Affected products

• Nextcloud Mail: from 1.13.0, before 1.15.3 (fixed in 1.15.3); from 2.2.0, before 2.2.5 (fixed in 2.2.5); from 2.3.0, before 3.0.2 (fixed in 3.0.2)

Published 2023-05-27. Last modified 2026-06-17.