CVE-2021-32655

Nextcloud Server is a Nextcloud package that handles data storage. In versions prior to 19.0.11, 20.0.10, and 21.0.2, an attacker is able to convert a Files Drop link to a federated share. This causes an issue on the UI side of the sharing user. When the sharing user opens the sharing panel and tries to remove the "Create" privileges of this unexpected share, Nextcloud server would silently grant the share read privileges. The vulnerability is patched in versions 19.0.11, 20.0.10 and 21.0.2. No workarounds are known to exist.

• CWE-241

• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jvThird Party Advisory
• https://hackerone.com/reports/1167929Permissions Required, Third Party Advisory
• https://security.gentoo.org/glsa/202208-17Third Party Advisory
• https://github.com/nextcloud/security-advisories/security/advisories/GHSA-grph-cm44-p3jvThird Party Advisory
• https://hackerone.com/reports/1167929Permissions 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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