CVE-2023-39953 (published 2023-08-10T13:55:19.957Z)
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.
Affected products: Vendor: nextcloud
Product: security-advisories
Versions: >= 1.0.0, < 1.3.3