CVE-2025-7697

Comprehensive Technical Analysis of CVE-2025-7697

1. Vulnerability Assessment and Severity Evaluation

CVE ID: CVE-2025-7697 CVSS Score: 9.8

The vulnerability in the "Integration for Google Sheets and Contact Form 7, WPForms, Elementor, Ninja Forms" plugin for WordPress is classified as a PHP Object Injection vulnerability. This type of vulnerability is particularly severe due to its potential for remote code execution (RCE) and denial of service (DoS) attacks. The CVSS score of 9.8 indicates a critical severity level, highlighting the urgent need for mitigation.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Access: The vulnerability allows unauthenticated attackers to exploit the deserialization of untrusted input within the verify_field_val() function.
• PHP Object Injection: Attackers can inject malicious PHP objects, which can be leveraged to execute arbitrary code or manipulate the application's behavior.
• POP Chain Exploitation: The presence of a Property-Oriented Programming (POP) chain in the Contact Form 7 plugin, which is often used alongside the vulnerable plugin, can be exploited to delete arbitrary files.

Exploitation Methods:

• Deserialization Attack: An attacker can send crafted input to the verify_field_val() function, leading to the deserialization of a malicious PHP object.
• File Deletion: By exploiting the POP chain, an attacker can delete critical files such as wp-config.php, leading to a DoS condition or enabling further RCE attacks.

3. Affected Systems and Software Versions

Affected Software:

• Integration for Google Sheets and Contact Form 7, WPForms, Elementor, Ninja Forms plugin for WordPress
• All versions up to and including 1.1.1

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 full exploitation.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update Plugins: Ensure that all WordPress plugins, especially the affected ones, are updated to the latest versions.
• Disable Vulnerable Plugins: Temporarily disable the vulnerable plugin until a patched version is available.
• Monitor Logs: Closely monitor server logs for any suspicious activity related to the vulnerable plugin.

Long-Term Mitigation:

• Regular Updates: Implement a regular update schedule for all WordPress plugins and core files.
• Security Plugins: Use security plugins like Wordfence to monitor and protect against known vulnerabilities.
• Code Review: Conduct thorough code reviews and security audits for all third-party plugins before deployment.

5. Impact on Cybersecurity Landscape

The discovery of CVE-2025-7697 underscores the importance of vigilant plugin management in WordPress environments. Given the widespread use of WordPress and the popularity of the affected plugins, this vulnerability poses a significant risk to a large number of websites. The potential for RCE and DoS attacks highlights the need for robust security practices and continuous monitoring.

6. Technical Details for Security Professionals

Vulnerability Details:

• Deserialization Issue: The verify_field_val() function in the 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 delete arbitrary files, including critical configuration files like wp-config.php.

Detection and Response:

• Intrusion Detection Systems (IDS): Implement IDS to detect and alert on suspicious deserialization attempts.
• Web Application Firewalls (WAF): Use WAFs to block known attack patterns related to PHP Object Injection.
• Incident Response: Develop an incident response plan that includes steps for identifying and mitigating deserialization vulnerabilities.

Code Example (for educational purposes):

// Vulnerable code snippet (simplified)
function verify_field_val($input) {
    $data = unserialize($input);
    // Processing logic
}

// Secure code snippet
function verify_field_val($input) {
    if (is_string($input)) {
        $data = json_decode($input, true);
        // Processing logic
    } else {
        // Handle invalid input
    }
}

Conclusion: CVE-2025-7697 represents a critical vulnerability that requires immediate attention from WordPress administrators. By understanding the technical details and implementing the recommended mitigation strategies, organizations can significantly reduce the risk of exploitation and protect their digital assets.