Overview
The cybersecurity world is facing a new high-severity vulnerability in the WPFunnels plugin, known as CVE-2025-47530. This vulnerability is related to the deserialization of untrusted data, which can lead to object injection and consequently result in potential system compromise or data leakage. As WPFunnels is a widely used tool for creating sales funnels in WordPress websites, it is crucial for every user to understand this vulnerability and take the necessary steps to mitigate its impact.
Vulnerability Summary
CVE ID: CVE-2025-47530
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise or data leakage
Affected Products
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Product | Affected Versions
WPFunnels | n/a through 3.5.18
How the Exploit Works
The exploitation of this vulnerability is primarily achieved through the deserialization of untrusted data. An attacker can inject malicious objects into serialized data, which is then deserialized by the application. This process can lead to the execution of unintended code or actions within the application’s context, potentially leading to system compromise or data leakage.
Conceptual Example Code
Below is a conceptual example of how the vulnerability might be exploited. This is a simple HTTP POST request with a malicious payload:
POST /wpfunnels/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"object": {
"_type": "custom",
"_value": {
"serialized": "rO0ABXNyABdqYXZhLnV0aWwuSGFzaE1hcAUH2sHDFmDRAwACRgAKbG9hZEZhY3RvckkACXRocmVzaG9sZHhwP0AAAAAAAAB3CAAAABAAAAAAeHIAJ2phdmEubGFuZy5SdW50aW1lRXhjZXB0aW9u1ZlGNSx0AgAAeHIAE2phdmEubGFuZy5FeGNlcHRpb27Q_R8-GjscxAIAAHhwdwQKdW5rbm93biBlcnJvcg=="
}
}
}In this hypothetical exploit, the “serialized” value within the JSON payload is a base64-encoded serialized object that includes a malicious payload.
Please note that this is a simplified example and real-world attacks might be more complex and harder to detect.
Mitigation Guidance
The best mitigation for this vulnerability is to apply the vendor patch as soon as it’s available. As a temporary measure, the use of a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help to detect and prevent exploitation attempts. However, these are just preventative measures and cannot completely eliminate the risk. Therefore, it is highly recommended to update the WPFunnels software to a version where this vulnerability is patched.