EUVD-2025-13311

Comprehensive Technical Analysis of EUVD-2025-13311

1. Vulnerability Assessment and Severity Evaluation

The vulnerability described in EUVD-2025-13311 pertains to a Privilege Escalation issue in the Job Listings plugin for WordPress. The vulnerability arises from improper authorization within the register_action() function, specifically in versions 0.1 to 0.1.1. The plugin's registration handler inadequately sanitizes the $_POST['user_role'] parameter, allowing unauthenticated attackers to elevate their privileges to that of an administrator.

Severity Evaluation:

• Base Score: 9.8 (Critical)
• Base Score Version: CVSS:3.1
• Base Score Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

The high base score indicates a critical vulnerability due to the following factors:

• Attack Vector (AV:N): Network-based attack, which means it can be exploited remotely.
• Attack Complexity (AC:L): Low complexity, indicating that the attack is relatively easy to execute.
• Privileges Required (PR:N): No privileges are required, meaning unauthenticated users can exploit this vulnerability.
• User Interaction (UI:N): No user interaction is required, making the attack more straightforward.
• Scope (S:U): Unchanged, meaning the vulnerability affects the same security scope.
• Confidentiality (C:H), Integrity (I:H), Availability (A:H): High impact on all three CIA triad components.

2. Potential Attack Vectors and Exploitation Methods

Attack Vectors:

• Unauthenticated Privilege Escalation: An attacker can send a crafted HTTP POST request to the vulnerable endpoint, setting the user_role parameter to administrator. This allows the attacker to gain administrative access to the WordPress site.

Exploitation Methods:

• Direct Exploitation: By sending a POST request with the user_role parameter set to administrator, an attacker can bypass authentication and authorization mechanisms.
• Automated Scripts: Attackers can use automated scripts to scan for vulnerable installations and exploit them en masse.

3. Affected Systems and Software Versions

Affected Software:

• Job Listings Plugin for WordPress
  • Versions: 0.1 to 0.1.1

Affected Systems:

• Any WordPress installation using the Job Listings plugin within the specified version range.

4. Recommended Mitigation Strategies

Immediate Actions:

• Update the Plugin: Ensure that the Job Listings plugin is updated to a version that addresses this vulnerability.
• Disable the Plugin: If an update is not available, consider disabling the plugin until a fix is released.
• Monitor for Suspicious Activity: Implement monitoring to detect any unusual administrative activities or unauthorized access attempts.

Long-Term Mitigation:

• Regular Updates: Keep all plugins and WordPress core up to date.
• Access Controls: Implement strict access controls and regularly review user roles and permissions.
• Security Plugins: Use security plugins like Wordfence to monitor and protect against vulnerabilities.
• Code Review: Conduct thorough code reviews and security audits for custom plugins and themes.

5. Impact on European Cybersecurity Landscape

The vulnerability poses a significant risk to the European cybersecurity landscape, particularly for organizations and individuals using WordPress with the Job Listings plugin. The potential for unauthenticated privilege escalation can lead to:

• Data Breaches: Unauthorized access to sensitive data.
• Website Defacement: Attackers can modify website content.
• Malware Distribution: Compromised sites can be used to distribute malware.
• Reputation Damage: Organizations may suffer reputational damage due to security breaches.

6. Technical Details for Security Professionals

Vulnerable Code Snippet:

function register_action() {
    // ...
    $user_role = $_POST['user_role'];
    wp_insert_user(array('role' => $user_role));
    // ...
}

Exploitation Example:

POST /wp-admin/admin-ajax.php HTTP/1.1
Host: vulnerable-site.com
Content-Type: application/x-www-form-urlencoded

action=register_action&user_role=administrator

Mitigation Code Snippet:

function register_action() {
    // ...
    $allowed_roles = array('subscriber', 'contributor');
    $user_role = $_POST['user_role'];
    if (in_array($user_role, $allowed_roles)) {
        wp_insert_user(array('role' => $user_role));
    } else {
        // Handle invalid role
    }
    // ...
}

References:

• Wordfence Threat Intelligence
• WordPress Plugin Repository
• WordPress Plugin Page

Aliases:

• CVE-2025-3918

Assigner:

• Wordfence

ENISA IDs:

• Product: beb0ad34-e2c2-3ae0-92b2-f2187fba19e4
• Vendor: 37dbf250-c28c-357b-aeee-04aa018aa27e

By addressing this vulnerability promptly and implementing robust security measures, organizations can mitigate the risk of exploitation and protect their digital assets.