What is CVE-2023-38694?

CVE-2023-38694 is a low-severity vulnerability in Umbraco Umbraco-Cms, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2023-12-12.

How severe is CVE-2023-38694?

Low severity. CVSS v3 base score is 3.5 out of 10.

XSS in Umbraco Umbraco-Cms

CVE-2023-38694

Umbraco is an ASP.NET content management system (CMS). Starting in version 8.0.0 and prior to versions 8.18.10, 10.7.0, and 12.1.0, a user with access to a specific part of the backoffice is able to inject HTML code into a form where it is not intended. Versions 8.18.10, 10.7.0, and 12.1.0 contain a patch for this issue.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2023-12-12 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 3.5 (Low). Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.004 (32.9th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 33rd percentile — 32.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000

Affected products

Umbraco Umbraco-Cms — versions >= 8.0.0, < 8.18.10, >= 9.0.0-rc001, < 10.7.0, >= 11.0.0-rc1, < 12.1.0
Umbraco Cms

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

github.com/umbraco/Umbraco-CMS/security/advisories/GHSA-xxc6-35r7-796w (Vendor Advisory)

Frequently asked questions

What is CVE-2023-38694?: CVE-2023-38694 is a low-severity vulnerability in Umbraco Umbraco-Cms, classified under Cross-site Scripting. CVSS score: 3.5/10. Published 2023-12-12.
How severe is CVE-2023-38694?: Low severity. CVSS v3 base score is 3.5 out of 10.