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Critical

baserCMS Update Functionality Vulnerable to OS Command Injection

  • Disclosed: 31.03.2026
  • Updated: 11.10.2026 10:22

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.

Affected software

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PlatformPackageVulnerable versionsFixed in
Composer package baserproject/basercms < 5.2.3 5.2.3

References

CVSS score 9.1/10
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE)
CWE-78
Platform
Composer
Package
baserproject/basercms
Disclosed
31.03.2026
Updated
11.10.2026 10:22

Sources and licenses

OSV / GitHub Advisory Database - GHSA-m9g7-rgfc-jcm7 - CC BY 4.0

Vulnerability history: baserproject/basercms

All published vulnerabilities of this package (Composer package), newest first. Shows whether this is a one-off slip or a package that needs watching.

All (56) in the archive
Total entries
56
First → latest
08.2020 03.2026
Without a fix
7
Exploited in attacks
0

Severity breakdown

  • Critical 7
  • High 15
  • Medium 29
  • Low 5

Disclosures per year

Severity:
  1. baserCMS is Vulnerable to Cross-site Scripting
    High · 7.1 CVE-2026-32734 < 5.2.3 5.2.3
  2. baserCMS Path Traversal Leads to Arbitrary File Write and RCE via Theme File API
    High · 7.2 CVE-2026-30940 < 5.2.3 5.2.3
  3. baserCMS has OS command injection vulnerability in installer
    Critical CVE-2026-30880 < 5.2.3 5.2.3
  4. baserCMS Update Functionality Vulnerable to OS Command Injection this entry
    Critical · 9.1 CVE-2026-30877 < 5.2.3 5.2.3
  5. baserCMS has OS Command Injection Leading to Remote Code Execution (RCE)
    Critical · 9.1 CVE-2026-21861 < 5.2.3 5.2.3
  6. baserCMS has Unsafe File Upload Leading to Remote Code Execution (RCE)
    High · 8.7 CVE-2025-32957 < 5.2.3 5.2.3
  7. baserCMS allows any file to be uploaded
    Critical · 9.8 CVE-2023-25655 < 4.7.5 4.7.5
  8. baserCMS File Uploader Remote Code Execution (RCE) vulnerability
    Critical · 9.8 CVE-2023-25654 < 4.7.5 4.7.5
  9. CSRF in baserCMS 3.0.10 and earlier
    High · 8.8 CVE-2016-4881 < 3.0.11 3.0.11
  10. baserCMS Cross Site Request Forgery vulnerability
    High · 8.8 CVE-2016-4878 < 3.0.11 3.0.11
  11. OS Command Injection in baserCMS
    High · 8.8 CVE-2018-0569 >= 4.0.0, <= 4.1.0.1, <= 3.0.15 no fix
  12. baserCMS SQL Injection vulnerability
    Critical · 9.8 CVE-2017-10842 < 3.0.15, >= 4.0.0, < 4.0.6 3.0.15, 4.0.6
  13. Code Injection in baserCMS
    High · 8.8 CVE-2017-10844 <= 3.0.14, >= 4.0.0, <= 4.0.5 no fix
  14. baserCMS vulnerable to Access Control Bypass
    High · 8.1 CVE-2018-0572 >= 4.0.0, < 4.1.1, < 3.0.16 4.1.1, 3.0.16
  15. Arbitrary file delete in baserCMS
    High · 7.5 CVE-2017-10843 < 3.0.15, >= 4.0.0, < 4.0.6 3.0.15, 4.0.6
  16. CSRF in baserCMS 3.0.10 and earlier
    High · 8.8 CVE-2016-4879 <= 3.0.10 no fix
  17. RCE in baserCMS before 4.1.4
    High · 7.2 CVE-2018-18942 < 4.1.4 4.1.4
  18. OS Command Injection Vulnerability and Potential Zip Slip Vulnerability in baserCMS
    Critical · 9.1 CVE-2021-41243 < 4.5.4 4.5.4
  19. Potential Zip Slip Vulnerability in baserCMS
    High · 7.7 CVE-2021-41279 < 4.5.4 4.5.4
  20. Cross-site scripting vulnerability in file upload
    High · 8.7 CVE-2021-39136 < 4.5.1 4.5.1
Show more (2) Showing 20 of 22

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