CVE-2021-27394: Mendix

High severity, CVSS 8.8. EPSS: 0.8% chance of exploitation in the next 30 days.

A vulnerability has been identified in Mendix Applications using Mendix 7 (All versions < V7.23.19), Mendix Applications using Mendix 8 (All versions < V8.17.0), Mendix Applications using Mendix 8 (V8.12) (All versions < V8.12.5), Mendix Applications using Mendix 8 (V8.6) (All versions < V8.6.9), Mendix Applications using Mendix 9 (All versions < V9.0.5). Authenticated, non-administrative users could modify their privileges by manipulating the user role under certain circumstances, allowing them to gain administrative privileges.

Affected products

• Mendix Mendix: from 7.0.2, before 7.23.19 (fixed in 7.23.19); from 8.0.0, before 8.17.0 (fixed in 8.17.0); from 9.0.0, before 9.0.5 (fixed in 9.0.5); from 8.6.0, before 8.6.9 (fixed in 8.6.9); from 8.12.0, before 8.12.5 (fixed in 8.12.5)

Published 2021-04-16. Last modified 2026-06-17.