EUVD-2024-49590

Comprehensive Technical Analysis of EUVD-2024-49590

1. Vulnerability Assessment and Severity Evaluation

The vulnerability identified in the "Widget Options – The #1 WordPress Widget & Block Control Plugin" allows for Remote Code Execution (RCE) in versions up to and including 4.0.7. The issue arises from the plugin's display logic functionality, which extends several page builders and allows user input to be passed through the eval() function without proper filtering or capability checks. This vulnerability is particularly severe because it enables authenticated attackers with contributor-level access or higher to execute arbitrary code on the server.

Severity Evaluation:

• Base Score: 9.9 (Critical)
• Base Score Version: CVSS:3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

The high base score indicates that this vulnerability poses a significant risk. The attack vector is network-based (AV:N), requires low complexity (AC:L), and necessitates low privileges (PR:L). The impact on confidentiality, integrity, and availability is high (C:H/I:H/A:H), and the scope is changed (S:C), meaning the vulnerability affects components beyond its security scope.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Authenticated Users: Attackers with contributor-level access or higher can exploit this vulnerability. This includes users with roles such as contributors, authors, editors, and administrators.
• Input Manipulation: The attacker can manipulate the input passed to the eval() function to execute arbitrary code.

Exploitation Methods:

• Code Injection: By crafting malicious input, an attacker can inject and execute arbitrary PHP code on the server.
• Privilege Escalation: An attacker with lower privileges (e.g., contributor) can escalate their privileges to gain higher access levels.

3. Affected Systems and Software Versions

Affected Software:

• Widget Options – The #1 WordPress Widget & Block Control Plugin
• Versions: All versions up to and including 4.0.7

Affected Systems:

• WordPress Websites: Any WordPress site using the affected versions of the plugin.
• Page Builders: The vulnerability extends to several page builders, including Gutenberg, Beaver Builder, and Elementor.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the plugin is updated to a version higher than 4.0.7.
• Access Control: Limit user roles and permissions to the minimum necessary. Avoid granting contributor-level access to untrusted users.
• Input Validation: Implement strict input validation and sanitization to prevent malicious input from being processed.

Long-Term Strategies:

• Code Review: Conduct a thorough code review to identify and mitigate similar vulnerabilities.
• Security Audits: Regularly perform security audits and vulnerability assessments.
• Patch Management: Implement a robust patch management process to ensure timely updates and patches.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using WordPress for their websites. Given the widespread use of WordPress and the popularity of the affected plugin, the potential impact is substantial. Organizations must prioritize updating their plugins and implementing robust security measures to mitigate the risk.

6. Technical Details for Security Professionals

Vulnerability Details:

• Function Affected: eval()
• Input Handling: The plugin allows user input to be passed directly to the eval() function without proper filtering or capability checks.
• Code Execution: The lack of filtering enables the execution of arbitrary PHP code, leading to RCE.

References:

• Wordfence Threat Intel: Wordfence Vulnerability Report
• WordPress Plugin Repository:
  • Gutenberg Toolbar
  • Beaver Builder
  • Elementor Render
  • Changeset

Additional Notes:

• Vendor Response: The vendor did not fully implement the suggested mitigations, such as an allowlist of functions and limiting command execution to administrators. This leaves residual risk and potential for further hardening.
• EPSS Score: 46, indicating a moderate likelihood of exploitation in the wild.

Conclusion: This vulnerability highlights the importance of secure coding practices, regular updates, and robust access control measures. Organizations must remain vigilant and proactive in their cybersecurity efforts to protect against such critical vulnerabilities.