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CVE Record

CVE-2021-29659: ownCloud 10.7 has an incorrect access control vulnerability, leading to remote information disclosure.

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysismoderate

Security readout for executives and security teams

Plain-English summary

This issue could let a remote attacker make ownCloud 10.7 reveal a list of users through an access-control flaw in an API endpoint. That information can support phishing, account targeting, and reconnaissance. The source bundle does not provide a CVSS score, affected range beyond ownCloud 10.7, or confirmed fixed version.

Executive priority

Treat this as a near-term remediation item where ownCloud 10.7 is internet-facing or stores sensitive user identities. It is not presented as critical or actively exploited in the supplied sources, but user enumeration can materially improve follow-on attacks.

Technical view

CVE-2021-29659 is described as incorrect access control in ownCloud 10.7. A malformed API request could enumerate all users in one request, and on large instances the same behavior could create higher than normal load. Authentication requirements and exact endpoint details are not established in the supplied sources.

Likely exposure

Exposure is most likely for organizations running ownCloud 10.7 with the affected API reachable. The supplied data does not confirm whether other versions are affected, whether authentication is required, or whether default configurations are vulnerable.

Exploitation context

The source bundle reports remote information disclosure and user enumeration. CISA KEV status is false, and no cited source in the bundle confirms active exploitation. The description also notes potential load impact on large instances.

Researcher notes

Key missing evidence: CVSS vector, CWE mapping, affected version range, fixed version, authentication requirement, and endpoint specifics. Avoid assuming exploit maturity beyond the supplied description. Validate against the vendor advisory before making scanner logic or remediation claims.

Mitigation direction

  • Identify any ownCloud 10.7 deployments and owners.
  • Review the ownCloud advisory and release notes for vendor-confirmed remediation.
  • Apply the vendor-supported update or mitigation after validation.
  • Reduce unnecessary external exposure while remediation is pending.
  • Monitor for unusual API activity and bulk user enumeration patterns.

Validation and detection

  • Confirm deployed ownCloud versions across production and externally reachable assets.
  • Check whether affected API functionality is exposed to untrusted networks.
  • Review application logs for abnormal user lookup or enumeration activity.
  • Validate remediation against the ownCloud advisory and release notes.
  • Document any compensating controls if upgrade timing is delayed.
Prepared
Confidence
medium
Sources
4

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

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CVE-2021-29659 mapping review

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

0CVSS vectors
0Timeline events
0ADP providers
3Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
n/an/an/aListed
Weakness

CWE details

No CWE listed

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.