What is CVE-2023-23942?

CVE-2023-23942 is a medium-severity vulnerability in Nextcloud Desktop, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-02-06.

How severe is CVE-2023-23942?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Nextcloud Desktop

CVE-2023-23942

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.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.007 (48.8th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

Affected products

Nextcloud Desktop
Nextcloud Security-advisories — versions < 3.6.3

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)
security-advisories@github.com (Patch, x_refsource_MISC)
security-advisories@github.com (Permissions Required, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2023-23942?: CVE-2023-23942 is a medium-severity vulnerability in Nextcloud Desktop, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2023-02-06.
How severe is CVE-2023-23942?: Medium severity. CVSS v3 base score is 5.4 out of 10.