What is CVE-2025-40834?

CVE-2025-40834 is a medium-severity vulnerability in Siemens Mendix Richtext, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2025-11-17.

How severe is CVE-2025-40834?

Medium severity. CVSS v3 base score is 5.7 out of 10.

XSS in Siemens Mendix Richtext

CVE-2025-40834

A vulnerability has been identified in Mendix RichText (All versions >= V4.0.0 < V4.6.1). Affected widget does not properly neutralize the input. This could allow an attacker to execute cross-site scripting attacks.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (14.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.7 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:N/A:N.

Affected products

Siemens Mendix Richtext — versions V4.0.0

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

productcert@siemens.com

Frequently asked questions

What is CVE-2025-40834?: CVE-2025-40834 is a medium-severity vulnerability in Siemens Mendix Richtext, classified under Cross-site Scripting. CVSS score: 5.7/10. Published 2025-11-17.
How severe is CVE-2025-40834?: Medium severity. CVSS v3 base score is 5.7 out of 10.