Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | User Oidc | >= 1.0.0, < 1.3.3 |
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-vPatchVendor Advisory
- https://github.com/nextcloud/user_oidc/pull/642Patch
- https://hackerone.com/reports/2021684Permissions Required
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-xx3h-vPatchVendor Advisory
- https://github.com/nextcloud/user_oidc/pull/642Patch
- https://hackerone.com/reports/2021684Permissions Required
FAQ
What is CVE-2023-39953?
CVE-2023-39953 is a vulnerability with a CVSS score of 4.8 (MEDIUM). 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 allow...
How severe is CVE-2023-39953?
CVE-2023-39953 has been rated MEDIUM with a CVSS base score of 4.8/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2023-39953?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud User Oidc.