Detections
Analytics
CVE-2023-39953
medium
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, missing verification of the issuer would have allowed an attacker to perform a man-in-the-middle attack returning corrupted or known token they also have access to. user_oidc 1.3.3 contains a patch. No known workarounds are available.
References
https://hackerone.com/reports/2021684
https://github.com/nextcloud/user_oidc/pull/642
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-v363-q36j