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Vulnerability record · CVE-2021-29659 · published 20 May 2021

CVE-2021-29659: Owncloud server vulnerability

Owncloud · Owncloud Server

ownCloud 10.7 has an incorrect access control vulnerability, leading to remote information disclosure. Due to a bug in the related API endpoint, the attacker can enumerate all users in a single request by entering three whitespaces. Secondary, the retrieval of all users on a large instance could cause higher than average load on the instance.

6.5 CVSS 3.1 Medium EPSS 1.3% · top 30.1%
6.5CVSS 3.1 base score, v2 4.0
1.3%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
4References
17 Jun 2026Last modified by NVD

Description

ownCloud 10.7 has an incorrect access control vulnerability, leading to remote information disclosure. Due to a bug in the related API endpoint, the attacker can enumerate all users in a single request by entering three whitespaces. Secondary, the retrieval of all users on a large instance could cause higher than average load on the instance.

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://doc.owncloud.com/server/admin_manual/release_notes.html Release NotesVendor Advisory
https://owncloud.com/security-advisories/cve-2021-29659/ Vendor Advisory
https://doc.owncloud.com/server/admin_manual/release_notes.html Release NotesVendor Advisory
https://owncloud.com/security-advisories/cve-2021-29659/ Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

9.8CVE-2023-49105ownCloud Server WebDAV authentication bypass via pre-signed URLsownCloud core before 10.13.1 accepts pre-signed URLs even when the file owner has no signing-key configured, so the signature check is effectively sk…KEVEPSS 43%analysed10.0CVE-2015-4716Owncloud path traversal vulnerabilityDirectory traversal vulnerability in the routing component in ownCloud Server before 7.0.6 and 8.0.x before 8.0.4, when running on Windows, allows re…EPSS 25%9.8CVE-2014-2052Owncloud xml external entity (xxe) vulnerabilityZend Framework, as used in ownCloud Server before 5.0.15 and 6.0.x before 6.0.2, allows remote attackers to read arbitrary files, cause a denial of s…EPSS 2.5%9.0CVE-2015-7699Owncloud server improper input validation vulnerabilityThe files_external app in ownCloud Server before 7.0.9, 8.0.x before 8.0.7, and 8.1.x before 8.1.2 allows remote authenticated users to instantiate a…EPSS 4.0%9.0CVE-2015-4718Owncloud os command injection vulnerabilityThe external SMB storage driver in ownCloud Server before 6.0.8, 7.0.x before 7.0.6, and 8.0.x before 8.0.4 allows remote authenticated users to exec…EPSS 3.0%8.5CVE-2016-1499Owncloud information exposure vulnerabilityownCloud Server before 8.0.10, 8.1.x before 8.1.5, and 8.2.x before 8.2.2 allow remote authenticated users to obtain sensitive information from a dir…EPSS 3.5%7.8CVE-2015-4717Owncloud vulnerabilityThe filename sanitization component in ownCloud Server before 6.0.8, 7.0.x before 7.0.6, and 8.0.x before 8.0.4 does not properly handle $_GET parame…EPSS 2.8%7.5CVE-2015-6500Owncloud server path traversal vulnerabilityDirectory traversal vulnerability in ownCloud Server before 8.0.6 and 8.1.x before 8.1.1 allows remote authenticated users to list directory contents…EPSS 2.6%

Source: NIST National Vulnerability Database (record CVE-2021-29659), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.