Overview
The cybersecurity realm abounds with threats, some of which are more severe than others. In this blog, we focus on an especially serious vulnerability – CVE-2025-49330. This vulnerability affects the CRM Perks Integration for Contact Form 7 and Zoho CRM, Bigin. Specifically, the flaw lies in the deserialization process of untrusted data, which allows for object injection.
This vulnerability matters because it can potentially lead to system compromise and data leakage. Any organization using the affected versions of CRM Perks Integration for Contact Form 7 and Zoho CRM, Bigin is at risk. Considering the critical role CRM software plays in managing customer relationships, the impact of a successful exploit can be catastrophic.
Vulnerability Summary
CVE ID: CVE-2025-49330
Severity: Critical – CVSS 9.8
Attack Vector: Network
Privileges Required: None
User Interaction: None
Impact: Potential system compromise and data leakage
Affected Products
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Product | Affected Versions
Integration for Contact Form 7 and Zoho CRM, Bigin | n/a through 1.3.0
How the Exploit Works
The vulnerability arises from a flaw in the deserialization process of untrusted data in the affected software. Deserialization is the process of converting data from a flat format into an object your programming language can understand. If an attacker can manipulate this data before it’s deserialized, they can inject arbitrary objects into the software. This is known as an Object Injection, and it can potentially lead to code execution, system compromise, or data leakage.
Conceptual Example Code
Below is a conceptual example of how an attacker might exploit this vulnerability. The attacker sends a malicious payload to a vulnerable endpoint, which is then deserialized by the affected software.
POST /vulnerable/endpoint HTTP/1.1
Host: target.example.com
Content-Type: application/json
{ "malicious_payload": "{Serialized object with malicious code}" }Mitigation
To mitigate this vulnerability, it is recommended to apply the vendor patch as soon as possible. If the patch cannot be applied immediately, using a Web Application Firewall (WAF) or Intrusion Detection System (IDS) can serve as temporary mitigation. These systems can detect and block known attack patterns, providing a layer of protection until the patch can be applied.
As always, follow best practices for secure coding to prevent similar vulnerabilities in the future, including validating and sanitizing input data and limiting the use of deserialization where possible.