HOMEVULNERABILITIESCVE-2021-29659
MEDIUM

CVE-2021-29659

NVD-CWE-OtherPublished: May 20, 2021· Updated: Jun 17, 2026

6.5
CVSS v3.1

Official 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.

NVD Source

Technical Analysis

CVE-2021-29659 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

Exploitation requires low privileges, which limits the exposure to scenarios where an attacker has already gained initial access.

A successful exploit results in complete confidentiality breach (data exposure), with a CVSS base score of 6.5.

CVSS v3.1 Vector Breakdown

Exploitability
Attack VectorNetwork
Attack ComplexityLow
Privileges Req.Low
User InteractionNone
ScopeUnchanged
Impact
ConfidentialityHigh
IntegrityNone
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Affected Vendors & Products

owncloud1 product(s)
owncloud server
Source: NVD CPE · 1 total CPE entries

Exploit & PoC Resources

NO KNOWN EXPLOITNo public exploit confirmed at this time
Exploit-DB
Offensive Security exploit database
GitHub PoC Search
Community PoC repositories
Rapid7 / Metasploit
Metasploit module search
PacketStorm
Security advisories & exploits
NVD Detail
Official NIST entry
MITRE CVE
CVE Program entry
External links open in a new tab. Always verify in a controlled environment before use.

Official Patches & Advisories

ADVISORYhttps://doc.owncloud.com/server/admin_manual/release_notes.html
ADVISORYhttps://owncloud.com/security-advisories/cve-2021-29659/
ADVISORYhttps://doc.owncloud.com/server/admin_manual/release_notes.html
ADVISORYhttps://owncloud.com/security-advisories/cve-2021-29659/

All References (4)

→
https://doc.owncloud.com/server/admin_manual/release_notes.htmlRelease Notes · Vendor Advisory
→
https://owncloud.com/security-advisories/cve-2021-29659/Vendor Advisory
→
https://doc.owncloud.com/server/admin_manual/release_notes.htmlRelease Notes · Vendor Advisory
→
https://owncloud.com/security-advisories/cve-2021-29659/Vendor Advisory

Quick Facts

CVE IDCVE-2021-29659
CVSS Score6.5 / 10
SeverityMEDIUM
WeaknessNVD-CWE-Other
CISA KEVNo
Affected1 vendor(s)
PublishedMay 20, 2021

Related CVEs (NVD-CWE-Other)

CVE-2000-0798
10.0
CVE-2005-3277
10.0
CVE-2000-0515
10.0
CVE-2000-0699
10.0
CVE-2006-5558
10.0
CVE-1999-0765
10.0

Recommended Actions

  • →Apply vendor patches immediately
  • →Monitor CVE-2021-29659 in threat intel feeds
  • →Review IDS/IPS signatures for exploitation attempts
Data sourced from NVD (NIST), CISA KEV, and EPSS (FIRST). Analysis generated by CTIWATCH.COM. CVE data is provided under the NVD usage policy.
← All Vulnerabilities·Search for CVE-2021-29659·NVD