Vulnerability Description
Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn't enforced for pages marked as public. Any page marked as `@PublicPage` could thus be accessed with a valid user session that isn't authenticated. This particularly affects the Nextcloud Talk application, as this could be leveraged to gain access to any private chat channel without going through the Two-Factor flow. It is recommended that the Nextcloud Server be upgraded to 20.0.13, 21.0.5 or 22.2.0. There are no known workarounds aside from upgrading.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Nextcloud | Server | >= 20.0.3, < 20.0.13 |
Related Weaknesses (CWE)
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rThird Party Advisory
- https://github.com/nextcloud/server/pull/28725PatchThird Party Advisory
- https://hackerone.com/reports/1322865Permissions Required
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-7hvh-rThird Party Advisory
- https://github.com/nextcloud/server/pull/28725PatchThird Party Advisory
- https://hackerone.com/reports/1322865Permissions Required
FAQ
What is CVE-2021-41179?
CVE-2021-41179 is a vulnerability with a CVSS score of 6.5 (MEDIUM). Nextcloud is an open-source, self-hosted productivity platform. Prior to Nextcloud Server versions 20.0.13, 21.0.5, and 22.2.0, the Two-Factor Authentication wasn't enforced for pages marked as public...
How severe is CVE-2021-41179?
CVE-2021-41179 has been rated MEDIUM with a CVSS base score of 6.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2021-41179?
Check the references section above for vendor advisories and patch information. Affected products include: Nextcloud Server.