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Status published
Low
CVE-2022-39346
Missing length validation of user displayname in nextcloud server
Vulnerability Description
Nextcloud server is an open source personal cloud server. Affected versions of nextcloud server did not properly limit user display names which could allow a malicious users to overload the backing database and cause a denial of service. It is recommended that the Nextcloud Server is upgraded to 22.2.10, 23.0.7 or 24.0.3. There are no known workarounds for this issue.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6w9f-jgjx-4vj6
- https://github.com/nextcloud/server/pull/33052
- https://hackerone.com/reports/1588562
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42TARDPRPBTI5TJRBYRVVQGTL6KWRCV5/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRAER4DCCHHSUDFHQ6LTIH4JEJFF73IU/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R32L3P53AQKQQC652LA5U3AWFTZKPDK3/
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Affected Vendor
nextcloud
View all reports →Affected Software
security-advisories
Vulnerable Versions:
< 22.2.10, >= 23.0.0, < 23.0.7, >= 24.0.0, < 24.0.3
Timeline
Official Publish:
November 25th, 2022
Last Modified:
April 23rd, 2025
Added to House:
July 21st, 2026
CVSS Vectors
V3:
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L
MITRE ATT&CK TTPs
T1499
Endpoint Denial of Service
Impact
T1498
Network Denial of Service
Impact
T1190
Exploit Public-Facing Application
Initial Access
T1059
Command and Scripting Interpreter
Execution
T1068
Exploitation for Privilege Escalation
Privilege Escalation
T1213
Data from Information Repositories
Collection
T1565.002
Stored Data Manipulation
Impact