CVE-2023-32320

HIGH

Nextcloud Server 21.0.0-21.0.9.11 25.0.0-25.0.6 - Brute Force Attack via Parallel Request Bypass

Title source: llm
STIX 2.1

Description

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.

References (3)

Core 3
Core References
Permissions Required x_refsource_misc
https://hackerone.com/reports/1918525

Scores

CVSS v3 8.7
EPSS 0.0052
EPSS Percentile 67.0%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-307
Status published
Products (2)
nextcloud/nextcloud_server 21.0.0 - 21.0.9.12
nextcloud/nextcloud_server 25.0.0 - 25.0.7
Published Jun 22, 2023
Tracked Since Feb 18, 2026