CVE-2021-42025

Severity: medium (CVSS 6.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.6% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-11-09 · updated 2026-06-17
Weakness: CWE-863

Description

A vulnerability has been identified in Mendix Applications using Mendix 8 (All versions < V8.18.13), Mendix Applications using Mendix 9 (All versions < V9.6.2). Applications built with affected versions of Mendix Studio Pro do not properly control write access for certain client actions. This could allow authenticated attackers to manipulate the content of System.FileDocument objects in some cases, regardless whether they have write access to it.

Affected products

Siemens Mendix Applications using Mendix 7: from 8.0.0 before 8.18.13; from 9.0.0 before 9.6.2 — fixed in 8.18.13, 9.6.2

How to fix

Upgrade to a fixed version: Siemens Mendix Applications using Mendix 7 8.18.13, 9.6.2. Check the vendor advisory for mitigations.

References

Get alerted when CVE-2021-42025 or the next vulnerability affects your stack