CVE-2025-55037: 
Python vulnerability analysis and mitigation

A critical OS Command Injection vulnerability (CVE-2025-55037) was discovered in TkEasyGUI versions prior to v1.0.22. The vulnerability was disclosed on September 5, 2025, and affects the TkEasyGUI Python package. This security flaw allows remote unauthenticated attackers to execute arbitrary OS commands when specific settings are configured to construct messages from external sources (JPCERT Advisory).

The vulnerability is classified as an Improper Neutralization of Special Elements used in an OS Command (CWE-78). It has received a Critical severity rating with a CVSS v4.0 base score of 9.3 (CRITICAL) and a CVSS v3.0 base score of 9.8 (CRITICAL). The vulnerability is characterized by the following vector strings: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N and CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H (NVD Database).

When exploited, this vulnerability allows an unauthenticated remote attacker to execute arbitrary operating system commands on the affected system. The impact is particularly severe as it requires no user interaction and can be triggered remotely when the application settings are configured to construct messages from external sources (JPCERT Advisory).

Users are strongly advised to update TkEasyGUI to version 1.0.22 or later, which contains fixes for this vulnerability. The update is available through the standard Python package management system using the command 'pip install -U TkEasyGUI' (GitHub Release).