CVE-2026-30877: baserCMS Update Functionality Vulnerable to OS Command Injection
Summary The latest version of baserCMS (basercms-5.2.2) contains an OS command injection vulnerability (CWE-78) in its update functionality. Due to this issue, an authenticated user with administrator privileges in baserCMS can execute arbitrary OS commands on the server with the privileges of the user account running baserCMS. Details Please refer to the attached materials.
Published Mar 31, 2026
Affected packages
baserproject/basercms
- Ecosystem
- Composer (PHP)
- Affected
- <= 5.2.2
- Fixed in
- 5.2.3
- Check
composer show baserproject/basercms
Advisory details
From the GitHub Advisory Database (CC BY 4.0).
Summary
The latest version of baserCMS (basercms-5.2.2) contains an OS command injection vulnerability (CWE-78) in its update functionality. Due to this issue, an authenticated user with administrator privileges in baserCMS can execute arbitrary OS commands on the server with the privileges of the user account running baserCMS.
Details
Please refer to the attached materials. OSコマンドインジェクション（baserCMSのアップデート機能）.pdf
Impact
An authenticated user with administrator privileges in baserCMS can execute OS commands on the server with the privileges of the user account running baserCMS.
Credited to EricUeda.
References
How this page is made: the data panel comes from the GitHub Advisory Database, CISA’s KEV catalog, the NVD and FIRST EPSS, and updates twice a day. No analysis has been written for this entry yet. Methodology