CVE-2026-21861

baserCMS: OS Command Injection Leading to Remote Code Execution (RCE)

CVSS 9.1 CRITICALEPSS 2.3%CWE-78

Vexday Risk Score

28Baixo

Decisão SSVC (CISA)

Track

Sem sinal de exploração → monitorar

CVSS 9.1EPSS 2.3%KEV nãoPoC —Nuclei —Metasploit —Patch —

Ciclo de vida

31 mar 2026Publicada no NVD

Recomendação: Monitorar — sem sinal de exploração no momento.

baserCMS is a website development framework. Prior to version 5.2.3, baserCMS contains an OS command injection vulnerability in the core update functionality. An authenticated administrator can execute arbitrary OS commands on the server due to improper handling of user-controlled input that is directly passed to exec() without sufficient validation or escaping. This issue has been patched in version 5.2.3.

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Produtos afetados

baserproject · basercms

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Referências

https://basercms.net/security/JVN_20837860 https://github.com/baserproject/basercms/releases/tag/5.2.3 https://github.com/baserproject/basercms/security/advisories/GHSA-qxmc-6f24-g86g