CVE-2025-4665

Comprehensive Technical Analysis of CVE-2025-4665

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-4665 CVSS Score: 9.6

The vulnerability in the WordPress plugin Contact Form CFDB7, versions up to and including 1.3.2, is classified as a pre-authentication SQL injection vulnerability that can lead to insecure deserialization (PHP Object Injection). The CVSS score of 9.6 indicates a critical severity level, reflecting the potential for significant impact if exploited.

Severity Evaluation:

• Critical: The high CVSS score underscores the seriousness of the vulnerability. The combination of SQL injection and insecure deserialization can result in severe consequences, including data breaches, unauthorized access, and potential system compromise.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• SQL Injection: An attacker can exploit the vulnerability by sending crafted input to the plugin's endpoints, which are not sufficiently validated. This can manipulate backend SQL queries, leading to unauthorized data access or modification.
• Insecure Deserialization: The SQL injection can be leveraged to inject malicious serialized objects, which, when deserialized, can execute arbitrary code or manipulate the application's state.

Exploitation Methods:

• Crafted Payloads: Attackers can create specially crafted payloads that exploit the lack of input validation. These payloads can be sent to the vulnerable endpoints to trigger the SQL injection and subsequent insecure deserialization.
• Remote Exploitation: The vulnerability is remotely exploitable without authentication, making it a high-risk target for attackers. However, it requires a crafted interaction with the affected endpoint to trigger successfully.

3. Affected Systems and Software Versions

Affected Software:

• WordPress Plugin: Contact Form CFDB7
• Versions: Up to and including 1.3.2

Affected Systems:

• Any WordPress installation using the Contact Form CFDB7 plugin within the specified version range.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Plugin: Immediately update the Contact Form CFDB7 plugin to a version higher than 1.3.2, if available.
• Disable Plugin: If an update is not available, consider disabling the plugin until a patched version is released.

Long-Term Mitigation:

• Input Validation: Ensure that all user inputs are properly validated and sanitized to prevent SQL injection and insecure deserialization.
• Regular Audits: Conduct regular security audits and code reviews to identify and mitigate similar vulnerabilities.
• Web Application Firewall (WAF): Implement a WAF to detect and block malicious requests targeting known vulnerabilities.

5. Impact on Cybersecurity Landscape

Broader Implications:

• Widespread Use: Given the popularity of WordPress and its plugins, this vulnerability poses a significant risk to a large number of websites.
• Attack Surface: The combination of SQL injection and insecure deserialization increases the attack surface, making it a lucrative target for attackers.
• Reputation and Trust: Compromised websites can lead to loss of user trust and potential legal repercussions due to data breaches.

6. Technical Details for Security Professionals

Technical Analysis:

• SQL Injection: The vulnerability arises from insufficient validation of user input in the plugin's endpoints. Attackers can inject SQL commands into these inputs, manipulating the backend queries.
• Insecure Deserialization: The SQL injection can be used to inject serialized PHP objects. When these objects are deserialized, they can execute arbitrary code or manipulate the application's state, leading to PHP Object Injection.

Detection and Response:

• Log Analysis: Monitor logs for unusual SQL queries or deserialization errors, which may indicate an attempted exploit.
• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious activities related to SQL injection and deserialization attempts.
• Incident Response Plan: Develop and maintain an incident response plan to quickly address and mitigate any successful exploitation attempts.

Conclusion: CVE-2025-4665 represents a critical vulnerability in the WordPress plugin Contact Form CFDB7. The combination of SQL injection and insecure deserialization poses a significant risk to affected systems. Immediate mitigation strategies, including updating the plugin and implementing robust security measures, are essential to protect against potential exploitation. Regular security audits and proactive monitoring are crucial to maintaining a secure cybersecurity posture.