CVE-2021-32653

Nextcloud Server is a Nextcloud package that handles data storage. Nextcloud Server versions prior to 19.0.11, 20.0.10, or 21.0.2 send user IDs to the lookup server even if the user has no fields set to published. The vulnerability is patched in versions 19.0.11, 20.0.10, and 21.0.2; no workarounds outside the updates are known to exist.

• CWE-201

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-396j-vqpr-qg45Third Party Advisory
• https://hackerone.com/reports/1173436Permissions Required, Third Party Advisory
• https://security.gentoo.org/glsa/202208-17Third Party Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-396j-vqpr-qg45Third Party Advisory
• https://hackerone.com/reports/1173436Permissions Required, Third Party Advisory
• https://security.gentoo.org/glsa/202208-17Third Party Advisory

Published

Jun 1, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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