Overview
In the evolving landscape of cybersecurity, even a robust platform like WordPress isn’t immune to vulnerabilities. A notable issue has been found in Themeton FLAP – Business WordPress Theme that could potentially compromise the system or lead to data leakage. This vulnerability, known as CVE-2025-31396, allows for object injection through the deserialization of untrusted data. Given the widespread use of WordPress for business websites, this vulnerability could potentially expose a significant number of systems to risk.
Vulnerability Summary
CVE ID: CVE-2025-31396
Severity: Critical, with a CVSS score of 9.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Possible system compromise and potential data leakage
Affected Products
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Product | Affected Versions
Themeton FLAP – Business WordPress Theme | n/a through 1.5
How the Exploit Works
The vulnerability originates from the insecure deserialization of untrusted data. In a nutshell, serialization is the process of converting an object state to a byte stream, and deserialization is the reverse process. When an application deserializes untrusted data without proper validation, it can lead to an object injection attack. In this case, an attacker can manipulate the serialized data to inject malicious objects or other payloads, leading to arbitrary code execution.
Conceptual Example Code
Here’s a conceptual example of how the vulnerability might be exploited. This example is purely representative and not a real exploit.
POST /wp-content/themes/flap/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{
"object": {
"__type": "Type1",
"property1": "value1",
"property2": {
"__type": "Type2",
"property1": "value2",
"property2": "base64_encoded_malicious_object"
}
}
}In this example, base64_encoded_malicious_object is a malicious serialized object. When the server deserializes this object, it could lead to arbitrary code execution.
Mitigation Guidance
In order to mitigate this vulnerability, users are advised to apply the vendor-provided patch. If the patch is not immediately available or applicable, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as a temporary mitigation. However, this should only be seen as a stopgap measure, and users should still apply the vendor patch as soon as possible to fully address the vulnerability.