CVE-2021-29659

Name: CVE-2021-29659
Creator: NVD / NIST
Published: 2021-05-20T13:15:07.627+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.5/10EPSS 1.33%

Last modified Jun 17, 2026

CVE-2021-29659 is a medium-severity vulnerability rated 6.5/10 on the CVSS scale. 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. EPSS estimates a 1.33% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.5/10

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

EPSS Probability

1.33%

67.4th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

Vendor	Product	Versions
Owncloud	Owncloud Server	10.7.0

References

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

Timeline

Published: May 20, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-29659?

How severe is CVE-2021-29659?

CVE-2021-29659 has a CVSS score of 6.5/10 (MEDIUM severity). The EPSS model estimates a 1.33% probability of exploitation in the next 30 days.

How do I fix CVE-2021-29659?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-29659?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST