medium4.8
CVE-2023-39953
user_oidc provides the OIDC connect user backend for Nextcloud, an open-source cloud platform.
Impact
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 | Product | Affected versions |
|---|---|---|
| Nextcloud | User Oidc | from 1.0.0 before 1.3.3 |
Weakness classification
References
- NVD record
- CVE.org record
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-v363-q36j
- https://github.com/nextcloud/user_oidc/pull/642
- https://hackerone.com/reports/2021684
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-v363-q36j
- https://github.com/nextcloud/user_oidc/pull/642
- https://hackerone.com/reports/2021684