CVE-2025-49330 is a critical security vulnerability classified under CWE-502, which pertains to the deserialization of untrusted data. This vulnerability affects the CRM Perks Integration plugin for Contact Form 7 and Zoho CRM, Bigin, specifically versions up to 1.3.0. The flaw allows an attacker to perform object injection by exploiting unsafe deserialization processes within the integration component. Deserialization vulnerabilities occur when untrusted input is deserialized without proper validation or sanitization, enabling attackers to manipulate serialized objects to execute arbitrary code, escalate privileges, or cause denial of service. In this case, the vulnerability is remotely exploitable without requiring authentication or user interaction, as indicated by the CVSS vector (AV:N/AC:L/PR:N/UI:N). The impact is severe, with potential full compromise of confidentiality, integrity, and availability of affected systems. Given the integration’s role in connecting Contact Form 7 (a widely used WordPress form plugin) with Zoho CRM and Bigin (customer relationship management platforms), exploitation could lead to unauthorized access to sensitive customer data, manipulation of CRM records, injection of malicious payloads, and disruption of business operations. The absence of available patches at the time of publication increases the urgency for mitigation. Although no known exploits are reported in the wild yet, the high CVSS score of 9.8 underscores the critical nature of this vulnerability and the likelihood of future exploitation attempts.

For European organizations, the impact of this vulnerability is substantial due to the widespread use of Contact Form 7 in WordPress environments and the growing adoption of Zoho CRM and Bigin for customer relationship management. Exploitation could lead to unauthorized data disclosure, including personal data protected under GDPR, resulting in regulatory penalties and reputational damage. Attackers could manipulate CRM data, affecting sales, customer service, and marketing operations, potentially causing financial losses and operational disruption. Additionally, the ability to execute arbitrary code remotely without authentication raises the risk of lateral movement within corporate networks, enabling further compromise of critical infrastructure. Organizations handling sensitive customer information or operating in regulated sectors such as finance, healthcare, and telecommunications are particularly at risk. The integration’s role as a bridge between web forms and CRM systems makes it a strategic target for attackers aiming to infiltrate enterprise environments through web-facing applications.

1. Immediate mitigation should include disabling the CRM Perks Integration plugin for Contact Form 7 and Zoho CRM, Bigin until a secure patch is released. 2. Implement strict input validation and sanitization on all data received through Contact Form 7 forms to reduce the risk of malicious payloads entering the deserialization process. 3. Employ web application firewalls (WAFs) with custom rules to detect and block suspicious serialized object payloads targeting the vulnerable endpoints. 4. Monitor logs for unusual deserialization activity or unexpected object injection attempts, focusing on HTTP POST requests to Contact Form 7 submission endpoints. 5. Restrict network access to CRM integration components, limiting exposure to trusted IP addresses and internal networks where feasible. 6. Prepare for rapid patch deployment by establishing communication with CRM Perks and Zoho CRM vendors to obtain updates as soon as they become available. 7. Conduct security awareness training for development and IT teams on the risks of insecure deserialization and secure coding practices. 8. Consider implementing application-layer sandboxing or runtime application self-protection (RASP) solutions to detect and prevent exploitation attempts in real time.