CVE-2023-32320: Nextcloud Server

High severity, CVSS 7.5. EPSS: 0.9% chance of exploitation in the next 30 days.

Nextcloud Server is a data storage system for Nextcloud, a self-hosted productivity platform. When multiple requests are sent in parallel, all of them were executed even if the amount of faulty requests succeeded the limit by the time the response was sent to the client. This allowed someone to send as many requests the server could handle in parallel to bruteforce protected details instead of the configured limit, default 8. Nextcloud Server versions 25.0.7 and 26.0.2 and Nextcloud Enterprise Server versions 21.0.9.12, 22.2.10.12, 23.0.12.7, 24.0.12.2, 25.0.7 and 26.0.2 contain patches for this issue.

Affected products

• Nextcloud Nextcloud Server: from 21.0.0, before 21.0.9.12 (fixed in 21.0.9.12); from 22.0.0, before 22.2.10.12 (fixed in 22.2.10.12); from 23.0.0, before 23.0.12.7 (fixed in 23.0.12.7); from 24.0.0, before 24.0.12.2 (fixed in 24.0.12.2); from 25.0.0, before 25.0.7 (fixed in 25.0.7); from 26.0.0, before 26.0.2 (fixed in 26.0.2)

Published 2023-06-22. Last modified 2026-06-17.