CVE-2021-37630

Nextcloud Circles is an open source social network built for the nextcloud ecosystem. In affected versions the Nextcloud Circles application allowed any user to join any "Secret Circle" without approval by the Circle owner leaking private information. It is recommended that Nextcloud Circles is upgraded to 0.19.15, 0.20.11 or 0.21.4. There are no workarounds for this issue.

• CWE-639
• CWE-639

• https://github.com/nextcloud/circles/pull/768Patch, Third Party Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56j9-3rj4-wvgmThird Party Advisory
• https://hackerone.com/reports/1257624Permissions Required, Third Party Advisory
• https://github.com/nextcloud/circles/pull/768Patch, Third Party Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-56j9-3rj4-wvgmThird Party Advisory
• https://hackerone.com/reports/1257624Permissions Required, Third Party Advisory

Published

Sep 7, 2021

Last Modified

Jun 17, 2026

Status

Modified

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