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CVE-2022-39346

Missing length validation of user displayname in nextcloud server

MEDIUM
6.5
CVSS Score
Published: November 25, 2022 at 12:00 AM UTC
Updated: June 17, 2026 at 04:58 AM UTC
3 products affected across 2 vendorsFedoraNextcloud/serverNextcloud Enterprise Server

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Severity
MEDIUM6.5
Exploit prediction
EPSS 1%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Fedora· Fedora Projectrpm
95%
353637
Nextcloud Enterprise Server· Nextcloudnextcloud-app
95%
v < 22.2.1023.0.0 ≤ v < 23.0.724.0.0 ≤ v < 24.0.3
Affected range stops below 22.2.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 23.0.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 24.0.3, so it looks safe — our inference, not a vendor statement
Nextcloud/server· Nextcloudnextcloud-app
95%
v < 22.2.1023.0.0 ≤ v < 23.0.724.0.0 ≤ v < 24.0.3
Affected range stops below 22.2.10, so it looks safe — our inference, not a vendor statement
Affected range stops below 23.0.7, so it looks safe — our inference, not a vendor statement
Affected range stops below 24.0.3, so it looks safe — our inference, not a vendor statement

References (6)

Third Party Advisory
Source: [email protected]
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-6w9f-jgjx-4vj6
PatchThird Party Advisory
Source: [email protected]
https://github.com/nextcloud/server/pull/33052
Permissions RequiredThird Party Advisory
Source: [email protected]
https://hackerone.com/reports/1588562
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/42TARDPRPBTI5TJRBYRVVQGTL6KWRCV5/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/R32L3P53AQKQQC652LA5U3AWFTZKPDK3/
Vendor Advisory
Source: [email protected]
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TRAER4DCCHHSUDFHQ6LTIH4JEJFF73IU/

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

6.5MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
LOW
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-20CWE-400

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