Horizon Alert
Summary of the vulnerability and why it matters
A logic flaw in GetSimple CMS allows unauthenticated attackers to create new administrator accounts by exploiting a bug in the setup script's deletion process. This vulnerability could potentially lead to unauthorized control over the content management system. The main concern is confirming relevance and exposure, as no patched versions are currently available.
- Attackers can create admin accounts.
- It bypasses security after setup.
- Confirm if your system is affected.
Attack Path
How an attacker could exploit the issue
An unauthenticated attacker can exploit a logic flaw in GetSimple CMS's installation process to create a new administrator account. This occurs because a security control meant to remove the `admin/setup.php` file after installation fails due to a bug, leaving the setup script accessible. This flaw allows attackers to gain administrative privileges on the CMS.
- Attacker needs network access to the CMS.
- Vulnerable setup script allows account creation.
- Risk is full administrative control.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an unauthenticated attacker to create a new administrator account on a GetSimple CMS installation by exploiting a logic flaw in the setup script's deletion process. This could lead to unauthorized control over the content management system.
- Administrator account creation.
- Exploiting a setup script logic flaw.
- Unauthorized content management control.
Operational Fix
Recommended remediation, mitigation, and detection steps
The critical flaw in GetSimple CMS and its community edition enables unauthenticated attackers to create new administrator accounts by exploiting a logic error in the setup script deletion process. Infrastructure and platform teams are likely responsible for managing the GetSimple CMS instances. The immediate priority is to identify all deployed instances, assess their exposure and business criticality, and then coordinate with vendor management if a fix is provided by the vendor.
- Infrastructure or Platform team ownership.
- Verify internet-facing GetSimple CMS instances.
- Plan for vendor-provided fixes or mitigation.
