CVE-2021-27394: 
Mendix vulnerability analysis and mitigation

A vulnerability has been identified in Mendix Applications affecting multiple versions including Mendix 7 (versions < V7.23.19), Mendix 8 (versions < V8.17.0, V8.12 < V8.12.5, V8.6 < V8.6.9), and Mendix 9 (versions < V9.0.5). The vulnerability allows authenticated, non-administrative users to modify their privileges by manipulating user roles under certain circumstances, potentially gaining administrative privileges (NVD, CISA).

The vulnerability is classified as an Improper Privilege Management issue (CWE-269). It has been assigned a CVSS v3.1 Base Score of 8.8 HIGH with the vector string CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H, indicating a network-accessible vulnerability with low attack complexity that requires low privileges and no user interaction (NVD).

If exploited, this vulnerability allows authenticated users with non-administrative privileges to elevate their access rights to administrative level. This could lead to unauthorized access to sensitive data, system configurations, and administrative functions within the Mendix application (CISA).

Siemens has released updates to address this vulnerability. Users are recommended to update to the following versions: Mendix 7 to v7.23.19 or later, Mendix 8 to v8.17.0 or later, Mendix 8 (v8.12) to v8.12.5 or later, Mendix 8 (v8.6) to v8.6.9 or later, and Mendix 9 to v9.0.5 or later. As a general security measure, Siemens strongly recommends protecting network access with appropriate mechanisms (CISA).