CVE-2021-27394

Name: CVE-2021-27394
Creator: NVD / NIST
Published: 2021-04-16T20:15:12.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

HIGHCVSS 8.8/10EPSS 0.80%

Last modified Jun 17, 2026

CVE-2021-27394 is a high-severity vulnerability rated 8.8/10 on the CVSS scale. 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.. EPSS estimates a 0.80% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

8.8/10

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

0.80%

52.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-269

Affected Software

Vendor	Product	Versions
Mendix	Mendix	>= 7.0.2, < 7.23.19
Mendix	Mendix	>= 8.0.0, < 8.17.0
Mendix	Mendix	>= 9.0.0, < 9.0.5
Mendix	Mendix	>= 8.6.0, < 8.6.9
Mendix	Mendix	>= 8.12.0, < 8.12.5

References

https://cert-portal.siemens.com/productcert/pdf/ssa-875726.pdfVendor Advisory
https://cert-portal.siemens.com/productcert/pdf/ssa-875726.pdfVendor Advisory

Timeline

Published: Apr 16, 2021
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2021-27394?

How severe is CVE-2021-27394?

CVE-2021-27394 has a CVSS score of 8.8/10 (HIGH severity). The EPSS model estimates a 0.80% probability of exploitation in the next 30 days.

How do I fix CVE-2021-27394?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-27394?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST