CVE-2023-39958 Information

Description

Nextcloud Server provides data storage for Nextcloud an open source cloud platform. Starting in version 22.0.0 and prior to versions 22.2.10.13 23.0.12.8 24.0.12.5 25.0.9 26.0.4 and 27.0.1 missing protection allows an attacker to brute force the client secrets of configured OAuth2 clients. Nextcloud Server versions 25.0.9 26.0.4 and 27.0.1 and Nextcloud Enterprise Server versions 22.2.10.13 23.0.12.8 24.0.12.5 25.0.9 26.0.4 and 27.0.1 contain a patch for this issue. No known workarounds are available.

Reference

https://github.com/nextcloud/server/pull/38773 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-vv27-g2hq-v48h https://hackerone.com/reports/1258448