CVE-2026-8421
Gravedad CVSS v4.0:
ALTA
Tipo:
CWE-352
Falsificación de petición en sitios cruzados (Cross-Site Request Forgery)
Fecha de publicación:
21/05/2026
Última modificación:
21/05/2026
Descripción
*** Pendiente de traducción *** Concrete CMS 9.5.0 and below contains a CSRF vulnerability in the install_package() method of concrete/controllers/single_page/dashboard/extend/install.php. An attacker who can cause an authenticated administrator to visit a crafted page, and who has placed or caused a package to be present under DIR_PACKAGES//, can force the installation of that package without any CSRF protection. Package installation executes the package controller's install() method as the web server user, enabling remote code execution. In order to be vulnerable, the victim must be passing canInstallPackages. The Concrete CMS security team gave this vulnerability a CVSS v.4.0 score of 7.5 with vector CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:A/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N. Thanks https://github.com/maru1009 for reporting.
Impacto
Puntuación base 4.0
7.50
Gravedad 4.0
ALTA