Overview
In the world of cybersecurity, a new vulnerability has been identified and cataloged as CVE-2025-52761. This vulnerability resides in the popular WP Funnel Manager, a plugin used widely in WordPress sites. The vulnerability pertains to the deserialization of untrusted data which could potentially lead to system compromise or data leakage. It is crucial for organizations and individuals using WP Funnel Manager to understand the nature of this vulnerability, how it can be exploited, and how to mitigate its risks.
Vulnerability Summary
CVE ID: CVE-2025-52761
Severity: Critical (9.8 CVSS Score)
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: System compromise, Data leakage
Affected Products
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Product | Affected Versions
WP Funnel Manager | n/a through 1.4.0
How the Exploit Works
The vulnerability, CVE-2025-52761, is a deserialization of untrusted data vulnerability. It occurs when the application deserializes untrusted data without proper validation. In the case of the WP Funnel Manager, an attacker can send maliciously crafted data to the application, which it then deserializes, leading to an Object Injection. This can lead to arbitrary code execution, which an attacker can leverage to compromise the system or leak sensitive data.
Conceptual Example Code
Here is a conceptual example of how the vulnerability might be exploited:
POST /wp-funnel-manager/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "object": {"type":"<malicious_object>", "value":"<malicious_value>"} }In this example, the attacker sends a POST request to a vulnerable endpoint of the WP Funnel Manager. The “object” in the JSON payload contains a “type” and a “value”. The “type” can be any object type that the application understands and can deserialize, and the “value” can contain malicious code that gets executed once the object is deserialized.
Mitigation
The vendor has released a patch to address this vulnerability, and it is strongly recommended to apply this patch as soon as possible. In case of delay in patch application or unavailability, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can help mitigate the vulnerability by monitoring and blocking suspicious requests. However, these are temporary measures and cannot replace the need for patching and updating the software.
