CVE-2023-23942

Name: CVE-2023-23942
Creator: NVD / NIST
Published: 2023-02-06T21:15:09.727+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.66%

Last modified Jun 17, 2026

CVE-2023-23942 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. The Nextcloud Desktop Client is a tool to synchronize files from a Nextcloud Server with your computer. Versions prior to 3.6.3 are missing sanitisation on qml labels which are used for basic HTML elements such as `strong`, `em` and `head` lines in the UI of the desktop client. EPSS estimates a 0.66% chance of exploitation in the next 30 days.

Description

The Nextcloud Desktop Client is a tool to synchronize files from a Nextcloud Server with your computer. Versions prior to 3.6.3 are missing sanitisation on qml labels which are used for basic HTML elements such as `strong`, `em` and `head` lines in the UI of the desktop client. The lack of sanitisation may allow for javascript injection. It is recommended that the Nextcloud Desktop Client is upgraded to 3.6.3. There are no known workarounds for this issue.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.66%

46.7th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Nextcloud	Desktop	< 3.6.3

References

https://github.com/nextcloud/desktop/pull/5233Patch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-64qc-vf6v-8xggVendor Advisory
https://hackerone.com/reports/1788598Permissions Required, Third Party Advisory
https://github.com/nextcloud/desktop/pull/5233Patch
https://github.com/nextcloud/security-advisories/security/advisories/GHSA-64qc-vf6v-8xggVendor Advisory
https://hackerone.com/reports/1788598Permissions Required, Third Party Advisory

Timeline

Published: Feb 6, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-23942?

How severe is CVE-2023-23942?

CVE-2023-23942 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.66% probability of exploitation in the next 30 days.

How do I fix CVE-2023-23942?

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-2023-23942?

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

Scan your code now

Source: NVD / NIST