CVE-2023-28848 Information

Description

user_oidc is the OIDC connect user backend for Nextcloud an open source collaboration platform. A vulnerability in versions 1.0.0 until 1.3.0 effectively allowed an attacker to bypass the state protection as they could just copy the expected state token from the first request to their second request. Users should upgrade user_oidc to 1.3.0 to receive a patch for the issue. No known workarounds are available.

Reference

https://github.com/nextcloud/user_oidc/pull/580 https://hackerone.com/reports/1878381 https://github.com/nextcloud/security-advisories/security/advisories/GHSA-52hv-xw32-wf7f