Unrated severityNVD Advisory· Published Mar 8, 2022· Updated Apr 23, 2025
User enumeration setting not respected in Nextcloud server
CVE-2021-41239
Description
Nextcloud server is a self hosted system designed to provide cloud style services. In affected versions the User Status API did not consider the user enumeration settings by the administrator. This allowed a user to enumerate other users on the instance, even when user listings where disabled. It is recommended that the Nextcloud Server is upgraded to 20.0.14, 21.0.6 or 22.2.1. There are no known workarounds.
AI Insight
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Affected products
5- Range: <20.0.14 || >=21.0.0 <21.0.6 || >=22.0.0 <22.2.1
- osv-coords3 versionspkg:rpm/opensuse/nextcloud&distro=openSUSE%20Leap%2015.3pkg:rpm/suse/nextcloud&distro=SUSE%20Package%20Hub%2012pkg:rpm/suse/nextcloud&distro=SUSE%20Package%20Hub%2015%20SP3
< 21.0.9-bp153.2.12.1+ 2 more
- (no CPE)range: < 21.0.9-bp153.2.12.1
- (no CPE)range: < 21.0.9-37.1
- (no CPE)range: < 21.0.9-bp153.2.12.1
- nextcloud/security-advisoriesv5Range: < 20.0.14
Patches
Vulnerability mechanics
References
4- security.gentoo.org/glsa/202208-17mitrevendor-advisoryx_refsource_GENTOO
- github.com/nextcloud/security-advisories/security/advisories/GHSA-g722-cm3h-8wrxmitrex_refsource_CONFIRM
- github.com/nextcloud/server/issues/27122mitrex_refsource_MISC
- github.com/nextcloud/server/pull/29260mitrex_refsource_MISC
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