CVE-2021-41179

Summary

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.

Affected Software

VendorProductVersion RangeStatus
nextcloudsecurity-advisories< 20.0.13affected
nextcloudsecurity-advisories>= 21.0.0, < 21.0.5affected
nextcloudsecurity-advisories< 22.2.0affected

Weaknesses

  • CWE-304: CWE-304: Missing Critical Step in Authentication

ADP Enrichment

CVE Program Container

Additional References

References