Comprehensive Technical Analysis of CVE-2025-15030

CVE ID: CVE-2025-15030 CVSS Score: 9.8 (Critical) Affected Software: User Profile Builder (WordPress Plugin) < 3.15.2

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1. Vulnerability Assessment & Severity Evaluation

Vulnerability Type:

• Insecure Direct Object Reference (IDOR) in Password Reset Mechanism
• Broken Authentication (CWE-287)

Severity Justification (CVSS 9.8 - Critical):

Metric	Value	Justification
Attack Vector (AV)	Network (N)	Exploitable remotely without physical/logical access.
Attack Complexity (AC)	Low (L)	No specialized conditions required; only knowledge of a valid username.
Privileges Required (PR)	None (N)	No authentication or elevated privileges needed.
User Interaction (UI)	None (N)	No user interaction required (e.g., clicking a link).
Scope (S)	Unchanged (U)	Exploit affects the vulnerable component (WordPress plugin) but does not escape its security boundary.
Confidentiality (C)	High (H)	Full account takeover (e.g., administrator access).
Integrity (I)	High (H)	Attacker can modify user data, install malicious plugins, or deface the site.
Availability (A)	High (H)	Potential for denial-of-service (DoS) via repeated password resets or account lockouts.

Overall Impact:

• Critical due to unauthenticated remote exploitation leading to full account takeover (including administrator privileges).
• Low barrier to exploitation—only a valid username is required.
• High prevalence—WordPress powers ~43% of all websites, and User Profile Builder is a widely used plugin.

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2. Potential Attack Vectors & Exploitation Methods

Exploitation Scenario:

An attacker can reset the password of any WordPress user (including administrators) by sending unauthenticated HTTP requests to the plugin’s password reset endpoint, provided they know the target’s username.

Step-by-Step Exploitation:

1. Reconnaissance:

   • Identify target WordPress sites using User Profile Builder (via wp-content/plugins/profile-builder/ or Wappalyzer).
   • Enumerate usernames (e.g., via /wp-json/wp/v2/users, author archives, or default admin accounts).

2. Password Reset Request:

   • Send a crafted POST request to the vulnerable endpoint (e.g., /wp-admin/admin-ajax.php with action=pb_reset_password).
   • Example payload:

     POST /wp-admin/admin-ajax.php HTTP/1.1
     Host: vulnerable-site.com
     Content-Type: application/x-www-form-urlencoded
     
     action=pb_reset_password&username=admin&reset_key=1
     

   • The plugin fails to validate the request’s authenticity, allowing unauthenticated password resets.

3. Password Change:

   • The attacker receives a password reset link (or the plugin may auto-generate a new password).
   • The attacker sets a new password and gains full access to the compromised account.

4. Post-Exploitation:

   • Administrator Access: Install backdoors (e.g., malicious plugins), exfiltrate data, or deface the site.
   • Privilege Escalation: Modify user roles, create new admin accounts, or inject persistent malware.
   • Lateral Movement: Compromise other WordPress sites on shared hosting.

Automated Exploitation:

• Tools: WPScan, Burp Suite, or custom Python scripts can automate username enumeration and password resets.
• Mass Exploitation: Attackers could scan for vulnerable sites using search engines (e.g., inurl:"/wp-content/plugins/profile-builder/").

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3. Affected Systems & Software Versions

Vulnerable Software:

• User Profile Builder (WordPress Plugin) versions < 3.15.2.
• WordPress Core: Any version (vulnerability is plugin-specific).

Detection Methods:

• Manual Check:
  • Verify plugin version in /wp-content/plugins/profile-builder/readme.txt.
  • Test for vulnerability by attempting an unauthenticated password reset (e.g., via curl or Burp Suite).
• Automated Scanning:
  • WPScan:

    wpscan --url https://target-site.com --enumerate vp --plugins-detection aggressive
    

  • Nuclei Template:

    id: CVE-2025-15030
    info:
      name: User Profile Builder < 3.15.2 - Unauthenticated Password Reset
      severity: critical
      reference: https://wpscan.com/vulnerability/344cb1b1-342e-44b2-ae4a-3bb31be56b22/
    requests:
      - method: POST
        path:
          - "{{BaseURL}}/wp-admin/admin-ajax.php"
        body: "action=pb_reset_password&username=admin"
        matchers:
          - type: word
            words:
              - "password_reset"
    

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4. Recommended Mitigation Strategies

Immediate Actions:

1. Upgrade the Plugin:

   • Update to User Profile Builder 3.15.2 or later (patched version).
   • Verify the update via the WordPress dashboard or manual download from WordPress Plugin Repository.

2. Temporary Workarounds (if patching is delayed):

   • Disable the Plugin: Deactivate User Profile Builder until patched.
   • Rate Limiting: Implement WAF rules (e.g., ModSecurity) to block excessive password reset requests.
   • IP Whitelisting: Restrict /wp-admin/admin-ajax.php access to trusted IPs.
   • Custom Code Fix: Override the vulnerable function in functions.php:

     add_filter('pb_reset_password_request', function($request) {
         if (!is_user_logged_in()) {
             wp_die('Unauthorized', 403);
         }
         return $request;
     });
     

3. Monitor for Exploitation:

   • Review WordPress logs (/wp-content/debug.log, Apache/Nginx access logs) for suspicious pb_reset_password requests.
   • Use Wordfence or Sucuri to detect brute-force attempts.

Long-Term Hardening:

1. Principle of Least Privilege:

   • Avoid using default usernames (e.g., admin).
   • Restrict administrator roles to essential personnel.

2. Multi-Factor Authentication (MFA):

   • Enforce MFA for all WordPress accounts (e.g., via Wordfence, Google Authenticator).

3. Web Application Firewall (WAF):

   • Deploy Cloudflare, Sucuri, or ModSecurity to block exploitation attempts.

4. Regular Audits:

   • Scan for vulnerabilities using WPScan, Nuclei, or OpenVAS.
   • Subscribe to CISA KEV or WPScan vulnerability feeds for real-time alerts.

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5. Impact on the Cybersecurity Landscape

Broader Implications:

1. WordPress Ecosystem Risk:

   • WordPress plugins are a primary attack vector for website compromises (e.g., Magecart-style attacks, SEO spam, ransomware).
   • This vulnerability highlights the critical need for secure password reset mechanisms in CMS plugins.

2. Supply Chain Attacks:

   • Compromised WordPress sites can be used to distribute malware (e.g., via fake updates, drive-by downloads).
   • Attackers may chain vulnerabilities (e.g., CVE-2025-15030 + a file upload flaw) for deeper system access.

3. Regulatory & Compliance Risks:

   • GDPR/CCPA: Unauthorized access to user data may trigger breach notifications and fines.
   • PCI DSS: Compromised e-commerce sites risk payment card data exposure.

4. Threat Actor Trends:

   • Initial Access Brokers (IABs): May exploit this CVE to sell WordPress admin access on dark web forums.
   • Ransomware Groups: Could use compromised sites as command-and-control (C2) servers or for phishing campaigns.

Historical Context:

• Similar vulnerabilities in WordPress plugins (e.g., CVE-2021-24370 in ProfilePress, CVE-2022-0779 in UpdraftPlus) have led to mass exploitation.
• WPScan and Patchstack report that ~30% of WordPress vulnerabilities are in authentication mechanisms.

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6. Technical Details for Security Professionals

Root Cause Analysis:

• The vulnerability stems from missing authentication checks in the pb_reset_password AJAX action.
• The plugin’s password reset function (/includes/class-password-reset.php) does not:
  • Validate the requester’s session or nonce.
  • Require prior authentication (e.g., email verification).
  • Implement rate limiting or CAPTCHA.

Code-Level Vulnerability:

// Vulnerable code snippet (simplified)
add_action('wp_ajax_nopriv_pb_reset_password', 'pb_reset_password');
function pb_reset_password() {
    $username = sanitize_text_field($_POST['username']);
    $user = get_user_by('login', $username);
    if ($user) {
        $reset_key = get_password_reset_key($user);
        // Sends reset link without authentication
        pb_send_password_reset_email($user, $reset_key);
    }
}

Flaws:

1. No nopriv Check: The wp_ajax_nopriv_ hook allows unauthenticated access.
2. No CSRF Protection: Missing wp_nonce validation.
3. No Rate Limiting: Attackers can spam reset requests.

Exploit Proof of Concept (PoC):

# Enumerate usernames (if not already known)
curl -s "https://target-site.com/wp-json/wp/v2/users" | jq '.[].slug'

# Trigger password reset (replace 'admin' with target username)
curl -X POST "https://target-site.com/wp-admin/admin-ajax.php" \
     -d "action=pb_reset_password&username=admin"

Expected Output:

• If vulnerable, the site sends a password reset email to the admin’s address (or auto-resets the password).

Forensic Indicators of Compromise (IoCs):

Indicator	Description
Log Entry	POST /wp-admin/admin-ajax.php with action=pb_reset_password from unknown IPs.
Email Activity	Unexpected password reset emails sent to users.
User Account Changes	Unauthorized password changes or new admin accounts.
Plugin Modifications	Malicious plugins/themes installed (e.g., wp-vcd.php).

Detection & Hunting Queries:

• Splunk/ELK:

  index=wordpress sourcetype=access_* action=pb_reset_password
  | stats count by src_ip, username
  | where count > 5
  

• Sigma Rule:

  title: CVE-2025-15030 - Unauthenticated Password Reset Attempt
  id: 1a2b3c4d-5e6f-7g8h-9i0j
  status: experimental
  description: Detects attempts to exploit CVE-2025-15030 in User Profile Builder.
  references:
    - https://wpscan.com/vulnerability/344cb1b1-342e-44b2-ae4a-3bb31be56b22/
  author: Your Name
  date: 2026/02/02
  logsource:
    category: webserver
    product: wordpress
  detection:
    selection:
      cs-method: 'POST'
      cs-uri-query: '*action=pb_reset_password*'
    condition: selection
  falsepositives:
    - Legitimate password reset requests
  level: high
  

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Conclusion

CVE-2025-15030 represents a critical authentication bypass in a widely used WordPress plugin, enabling unauthenticated remote account takeovers. Given the low exploitation complexity and high impact, organizations must patch immediately and implement defensive controls (WAF, MFA, monitoring).

Security teams should:

1. Prioritize patching for all WordPress sites using User Profile Builder.
2. Hunt for exploitation in logs and monitor for unauthorized access.
3. Educate administrators on secure password reset practices and plugin hygiene.

For further details, refer to the WPScan advisory.