Horizon Alert
Summary of the vulnerability and why it matters
A vulnerability in Concrete CMS allows an attacker to trick an authenticated administrator into installing a malicious package. This can lead to remote code execution on the server.
- Attackers can install packages remotely.
- High impact on server security.
- Requires admin action to exploit.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this by tricking an authenticated administrator into visiting a malicious page. This would force the installation of a pre-placed package, leading to remote code execution.
- Requires administrator login.
- Triggered by visiting a crafted page.
- Package must exist beforehand.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability allows an unauthenticated attacker to trick an administrator into installing a malicious package, leading to remote code execution. While it requires administrator authentication and user interaction, the path to code execution is direct once a vulnerable administrator visits a crafted page with a prepared malicious package.
- Public exploit code is available.
- KEV listing is absent.
- This vulnerability was reported and analyzed recently.
Priority actions
Operational Fix
Recommended remediation, mitigation, and detection steps
Prioritize patching Concrete CMS to version 9.5.1 or later to address the CSRF vulnerability, which can lead to remote code execution. If patching is not immediately feasible, implement strict access controls and monitor for suspicious package installation attempts. Review user permissions to ensure only necessary administrators can install packages.
- Apply Concrete CMS version 9.5.1 update.
- Restrict package installation permissions.
- Monitor for unauthorized package installs.
