EUVD-2025-18629

Comprehensive Technical Analysis of EUVD-2025-18629

1. Vulnerability Assessment and Severity Evaluation

Vulnerability Description: The Recover WooCommerce Cart Abandonment, Newsletter, Email Marketing, Marketing Automation By FunnelKit plugin for WordPress is vulnerable to unauthorized arbitrary plugin installation. This vulnerability arises from a missing capability check on the install_or_activate_addon_plugins() function and a weak nonce hash in all versions up to, and including, 3.5.3.

Severity Evaluation: The vulnerability has a CVSS Base Score of 9.8, which is considered critical. The CVSS vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H indicates the following:

• Attack Vector (AV): Network (N)
• Attack Complexity (AC): Low (L)
• Privileges Required (PR): None (N)
• User Interaction (UI): None (N)
• Scope (S): Unchanged (U)
• Confidentiality (C): High (H)
• Integrity (I): High (H)
• Availability (A): High (H)

This high severity score underscores the critical nature of the vulnerability, which can be exploited remotely without any user interaction or special privileges.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Attackers: Due to the missing capability check and weak nonce hash, unauthenticated attackers can exploit this vulnerability.
• Remote Exploitation: The attack can be executed over the network, making it accessible to a wide range of potential attackers.

Exploitation Methods:

• Arbitrary Plugin Installation: Attackers can install arbitrary plugins on the vulnerable WordPress site.
• Malicious Plugin Deployment: By installing malicious plugins, attackers can gain further control over the site, leading to data exfiltration, site defacement, or other malicious activities.

3. Affected Systems and Software Versions

Affected Software:

• Plugin: Recover WooCommerce Cart Abandonment, Newsletter, Email Marketing, Marketing Automation By FunnelKit
• Versions: All versions up to, and including, 3.5.3

Affected Systems:

• WordPress Sites: Any WordPress site using the affected versions of the FunnelKit plugin.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Immediately update the FunnelKit plugin to a version higher than 3.5.3 if available.
• Disable the Plugin: If an update is not available, consider disabling the plugin until a patched version is released.

Long-Term Mitigation:

• Regular Updates: Ensure all plugins and WordPress core are regularly updated.
• Access Control: Implement strict access controls and capability checks for all administrative functions.
• Security Plugins: Use security plugins like Wordfence to monitor and protect against such vulnerabilities.
• Regular Audits: Conduct regular security audits and vulnerability assessments.

5. Impact on European Cybersecurity Landscape

Potential Impact:

• Widespread Exploitation: Given the popularity of WordPress and the FunnelKit plugin, this vulnerability could be exploited on a large scale, affecting numerous European businesses and organizations.
• Data Breaches: Unauthorized plugin installations can lead to data breaches, compromising sensitive information.
• Reputation Damage: Businesses relying on WordPress for their online presence may suffer reputational damage if their sites are compromised.

Regulatory Compliance:

• GDPR: Organizations must ensure they comply with GDPR regulations, which mandate the protection of personal data. Failure to address this vulnerability could result in regulatory penalties.

6. Technical Details for Security Professionals

Vulnerable Function:

• install_or_activate_addon_plugins()

Weaknesses:

• Missing Capability Check: The function lacks proper capability checks, allowing unauthorized access.
• Weak Nonce Hash: The nonce hash used for security is weak, making it easier for attackers to bypass security measures.

References for Further Analysis:

• Wordfence Threat Intel
• WordPress Trac Changeset
• Plugin Status Class
• Database Class
• API Loader Class
• API Base Class

Conclusion: This vulnerability poses a significant risk to WordPress sites using the affected versions of the FunnelKit plugin. Immediate action is required to mitigate the risk, including updating the plugin and implementing robust security measures. The European cybersecurity landscape must remain vigilant against such threats to protect data integrity and ensure compliance with regulatory standards.