A high-severity elevation of privilege vulnerability exists in Microsoft.TestPlatform.CLI affecting multiple versions starting from 17.2.0-preview-20220301-01 through various 17.x and 18.x releases. The vulnerability involves the VSTest artifact postprocessor consuming a forged executionComplete.json file from another local user, allowing execution of attacker-controlled output handling. This flaw affects Windows, Linux, and macOS platforms. Patched versions are available across affected servicing lines.