CVE-2023-39954 Information

Description

user_oidc provides the OIDC connect user backend for Nextcloud an open-source cloud platform. Starting in version 1.0.0 and prior to version 1.3.3 an attacker that obtained at least read access to a snapshot of the database can impersonate the Nextcloud server towards linked servers. user_oidc 1.3.3 contains a patch. No known workarounds are available.

Reference

https://hackerone.com/reports/1994328 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-3f92-5c8p-f6gq https://github.com/nextcloud/user_oidc/pull/636