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)

Published · last modified .

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.

EPSS exploit prediction

EPSS: 0.002 (13.1th percentile), scored .

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 13th percentile — 13.1% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS trend (30 days)EPSS over the last 30 days for CVE-2025-40834: held from 0.002 to 0.002.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

References

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.