CVE-2021-27394

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.8% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2021-04-16 · updated 2026-06-17
Weakness: CWE-269

Description

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

Siemens Mendix Applications using Mendix 7: from 7.0.2 before 7.23.19; from 8.0.0 before 8.17.0; from 9.0.0 before 9.0.5; from 8.6.0 before 8.6.9; from 8.12.0 before 8.12.5 — fixed in 7.23.19, 8.12.5, 8.17.0, 8.6.9, 9.0.5

How to fix

Upgrade to a fixed version: Siemens Mendix Applications using Mendix 7 7.23.19, 8.12.5, 8.17.0, 8.6.9. Check the vendor advisory for mitigations.

References

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