Overview
The CVE-2025-53243 represents a severe deserialization of Untrusted Data vulnerability found in the Employee Directory – Staff Listing & Team Directory Plugin, which is widely used in WordPress. WordPress, being one of the most popular content management systems globally, is frequently targeted by cybercriminals, making this vulnerability a significant concern. If exploited, this vulnerability could potentially lead to a system compromise or data leakage, greatly impacting businesses and individuals using this plugin.
Vulnerability Summary
CVE ID: CVE-2025-53243
Severity: High (CVSS: 8.1)
Attack Vector: Network
Privileges Required: None
User Interaction: Required
Impact: System compromise or data leakage
Affected Products
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- • Anonymous aliases
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Product | Affected Versions
Employee Directory – Staff Listing & Team Directory Plugin for WordPress | Versions up to 4.5.3
How the Exploit Works
The vulnerability stems from the deserialization of untrusted data. Deserialization is the process of converting serialized data back into its original form. In this case, untrusted data is being deserialized without proper validation. An attacker could exploit this by sending malicious serialized objects to the application, which, when deserialized, could lead to arbitrary code execution. This could potentially compromise the system or lead to data leakage.
Conceptual Example Code
Here is a conceptual example of how this vulnerability might be exploited using a malicious payload in a POST request:
POST /employee-directory/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "Serialized_Object_With_Malicious_Code" }In the above example, the attacker sends a serialized object containing malicious code as part of the POST request. When the application deserializes this object, the malicious code is executed.
Mitigation Guidance
The most straightforward mitigation is to apply the vendor patch. The developer of the affected plugin has released a patch that fixes the vulnerability, and users are advised to upgrade to the latest version immediately.
As a temporary mitigation, users can also employ a Web Application Firewall (WAF) or an Intrusion Detection System (IDS). These systems can detect and prevent known attack patterns associated with this vulnerability, offering some degree of protection until the patch can be applied.
It’s also good practice to avoid deserializing untrusted data whenever possible and to implement input validation to prevent such vulnerabilities from being exploited.
Remember, staying vigilant and keeping your systems updated are the best defenses against cybersecurity threats.
