Horizon Alert
Summary of the vulnerability and why it matters
This vulnerability affects Concrete CMS installations. The flaw allows an attacker to trick an authenticated administrator into downloading an arbitrary marketplace package. This could lead to the installation of unauthorized or malicious software on the organization's systems.
- Vulnerable CMS dashboard feature
- Missing security token validation
- Unauthorized package installation
Attack Path
How an attacker could exploit the issue
The described attack path involves an unauthenticated attacker exploiting a Cross-Site Request Forgery (CSRF) vulnerability in Concrete CMS. This occurs when an authenticated administrator visits a malicious page, leading to an unauthorized package download. The CMS fails to validate a CSRF token before processing requests to a specific dashboard endpoint, allowing an attacker to interfere with system integrity. The administrator's session is leveraged to execute this unauthorized action.
- Vulnerable endpoint exposed externally.
- Attacker crafts a malicious webpage.
- Administrator visits page; arbitrary package downloads.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability in Concrete CMS allows an unauthenticated attacker to potentially download arbitrary marketplace packages to an organization's servers. The attack requires tricking an authenticated administrator into visiting a malicious link, and the organization's site must be connected to the Concrete marketplace. This could lead to the installation of unapproved or malicious software, posing a significant risk to the integrity and security of business systems.
- Attacker skill level: High
- Required access or conditions: Authenticated administrator, site connected to marketplace
- Business risk or urgency: High
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability allows an unauthenticated attacker to force the download of arbitrary marketplace packages on affected systems. The attack requires an authenticated administrator to visit a malicious link, and the site must be connected to the Concrete marketplace. The primary risk is the potential for unauthorized code execution if a malicious package is installed.
- Find all Concrete CMS instances.
- Restrict access to the dashboard installation endpoint.
- Update Concrete CMS to the latest version and monitor for related activity.
