CVE-2025-7696

Comprehensive Technical Analysis of CVE-2025-7696

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-7696 CVSS Score: 9.8

The vulnerability in the Integration for Pipedrive and Contact Form 7, WPForms, Elementor, Ninja Forms plugin for WordPress is classified as a PHP Object Injection vulnerability. This type of vulnerability occurs due to the deserialization of untrusted input within the verify_field_val() function. The severity of this vulnerability is critical, as indicated by the CVSS score of 9.8. This high score reflects the potential for unauthenticated attackers to exploit the vulnerability, leading to severe impacts such as denial of service (DoS) or remote code execution (RCE).

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Access: The vulnerability allows unauthenticated attackers to inject malicious PHP objects.
• Deserialization: The attacker can exploit the deserialization process by sending crafted input to the verify_field_val() function.
• POP Chain: The presence of a Property-Oriented Programming (POP) chain in the Contact Form 7 plugin, which is commonly used alongside the vulnerable plugin, can be leveraged to achieve more severe impacts.

Exploitation Methods:

• PHP Object Injection: The attacker can inject a PHP object that, when deserialized, can manipulate the application's behavior.
• File Deletion: By exploiting the POP chain, the attacker can delete arbitrary files, including critical configuration files like wp-config.php.
• Remote Code Execution: Deleting wp-config.php can lead to RCE if the attacker can manipulate the application's configuration or inject malicious code.

3. Affected Systems and Software Versions

Affected Software:

• Integration for Pipedrive and Contact Form 7, WPForms, Elementor, Ninja Forms plugin for WordPress
• All versions up to and including 1.2.3

Affected Systems:

• WordPress installations using the vulnerable plugin versions.
• Systems where the Contact Form 7 plugin is also installed, as it provides the POP chain necessary for more severe exploitation.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Plugins: Ensure that all WordPress plugins, especially the Integration for Pipedrive and Contact Form 7, WPForms, Elementor, Ninja Forms plugin, are updated to the latest version.
• Disable Vulnerable Plugins: If an update is not available, consider disabling the vulnerable plugin until a patch is released.
• Monitor and Audit: Implement continuous monitoring and auditing of WordPress installations to detect any suspicious activities.

Long-Term Strategies:

• Regular Updates: Maintain a regular update schedule for all WordPress plugins and core files.
• Security Plugins: Use security plugins like Wordfence to detect and mitigate vulnerabilities.
• Code Review: Conduct thorough code reviews and security audits for custom plugins and third-party integrations.
• Access Control: Implement strict access controls and authentication mechanisms to limit unauthorized access.

5. Impact on Cybersecurity Landscape

The discovery of CVE-2025-7696 highlights the ongoing risks associated with third-party plugins and integrations in popular content management systems like WordPress. The critical nature of this vulnerability underscores the importance of regular security audits and timely updates. The potential for RCE and DoS attacks can have significant implications for website availability, data integrity, and user trust.

6. Technical Details for Security Professionals

Vulnerability Details:

• Deserialization Issue: The verify_field_val() function in the vulnerable plugin does not properly sanitize or validate input, leading to PHP Object Injection.
• POP Chain: The Contact Form 7 plugin contains a POP chain that can be exploited to achieve file deletion and potentially RCE.

Detection and Response:

• Log Analysis: Analyze server logs for unusual deserialization attempts or file deletion activities.
• Intrusion Detection: Implement intrusion detection systems (IDS) to monitor for suspicious network traffic and application behavior.
• Incident Response: Develop an incident response plan that includes steps for isolating affected systems, patching vulnerabilities, and restoring services.

Code Example (Vulnerable Function):

function verify_field_val($input) {
    $data = unserialize($input);
    // Processing logic
}

Mitigation Code Example:

function verify_field_val($input) {
    if (is_string($input)) {
        $data = json_decode($input, true);
        if (json_last_error() === JSON_ERROR_NONE) {
            // Processing logic
        } else {
            // Handle error
        }
    } else {
        // Handle invalid input
    }
}

By addressing the deserialization issue and ensuring proper input validation, the risk of PHP Object Injection can be significantly reduced.

Conclusion

CVE-2025-7696 represents a critical vulnerability in a popular WordPress plugin, highlighting the need for vigilant security practices. Immediate mitigation strategies include updating plugins, monitoring for suspicious activities, and implementing strict access controls. Long-term, organizations should focus on regular updates, security audits, and robust incident response plans to safeguard against similar vulnerabilities.