Horizon Alert
Summary of the vulnerability and why it matters
The Meta Box AIO plugin for WordPress, along with its standalone components for frontend submission and user profiles, contains a critical vulnerability that could allow unauthenticated attackers to gain administrator privileges. This is achieved through a chained flaw in how user and post data are processed, potentially enabling unauthorized changes to site content and user roles.
- Unauthenticated users can gain admin access.
- Critical flaw impacts website integrity and control.
- Confirm relevance and assess exposure of affected systems.
Attack Path
How an attacker could exploit the issue
An unauthenticated attacker could exploit this vulnerability by tricking the plugin into overwriting a page's content with a malicious shortcode. This shortcode then grants the attacker administrator privileges.
- No authentication required.
- Triggered via crafted GET parameter.
- Leads to full administrator access.
Live Threat
Current exploitation, exposure, and threat context
This vulnerability could allow an unauthenticated attacker to gain administrator privileges on a WordPress site. This is possible when specific Meta Box components are used, allowing an attacker to inject a shortcode that manipulates user roles and potentially logs them in automatically.
- Administrator access to the WordPress site.
- Chained flaws in form submission and user profile components.
- Complete control over the website.
Operational Fix
Recommended remediation, mitigation, and detection steps
The Meta Box AIO plugin's privilege escalation vulnerability impacts WordPress installations, making site administrators responsible for assessing and mitigating the risk. The first practical step is to confirm if this plugin is deployed, understand its business criticality, and identify the specific owner responsible for its upkeep and remediation.
- Site administrators or platform owners.
- Verify plugin presence and reachability.
- Plan coordinated remediation or vendor engagement.
