Plugin Name	Paytium
Type of Vulnerability	Access control vulnerability
CVE Number	CVE-2023-7290
Urgency	Low
CVE Publish Date	2026-02-16
Source URL	CVE-2023-7290

Critical Broken Access Control in Paytium (≤ 4.3.7) — Immediate Actions for WordPress Site Owners

This expert breakdown equips WordPress administrators with clear guidance on the Paytium Mollie payment forms & donations plugin vulnerability (CVE-2023-7290): its impact, detection, remediation, temporary mitigations including Managed-WP firewall rules, and best practices for incident response.

Published on: 2026-02-16
Author: Managed-WP Security Team

Tags: WordPress, Security, Managed-WP, Plugin Vulnerability, Paytium, CVE-2023-7290

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Executive Summary

A broken access control vulnerability impacts Paytium (Mollie payment forms & donations plugin) versions ≤ 4.3.7 (CVE-2023-7290). The issue stems from a missing authorization check in check_for_verified_profiles, a critical function that manages verified user profiles. Managed-WP strongly advises immediate plugin updates to 4.4 or later. Where immediate patching is not feasible, Managed-WP also offers virtual patching and tailored Web Application Firewall (WAF) rules to secure your site against exploitation.

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Table of Contents

• Technical Overview
• Risk and Impact Analysis
• How the Vulnerability Functions
• Attack Scenarios
• Vulnerability Verification Steps
• Stepwise Remediation
• Responsible Manual Patch Example
• Temporary WAF Mitigations
• Detection & Forensic Recommendations
• Hardening Guidelines
• Incident Response Playbook
• About Managed-WP Security Services
• Action Checklist
• Closing Security Insights

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Technical Overview

• Affected Plugin: Paytium (Mollie payment forms & donations)
• Vulnerable Versions: ≤ 4.3.7
• Fixed in: 4.4 and above
• Vulnerability: Broken Access Control — missing authorization on check_for_verified_profiles
• CVE Identifier: CVE-2023-7290
• Severity Score: CVSS ~4.3 (Low)
• Attack Vector: Unauthorized or low-privilege users can access sensitive functionality without proper permission checks.
• Immediate Recommendations: Update plugin ASAP. Use virtual patches or WAF rules until update can be applied.

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Risk and Impact Analysis

Broken access control vulnerabilities enable unauthorized users to perform restricted actions, potentially undermining site integrity and trust.

In Paytium’s context, the missing check allows manipulation of “verified profiles,” core to donation and payment workflows. Risks include:

• Compromised donation authenticity via forged verified profiles.
• Social engineering or impersonation possibilities within the plugin’s verification system.
• Potential risk amplification when chained with other vulnerabilities (CSRF, faulty payment validations).

Note: Despite a “Low” CVSS score, this vulnerability can have outsized real-world consequences. Timely mitigation is crucial.

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How the Vulnerability Functions

The root cause is that the function check_for_verified_profiles lacks mandatory authorization controls. Specifically, it fails to:

• Check user capabilities with current_user_can().
• Verify nonces (e.g., using check_ajax_referer() or REST API permissions).
• Confirm user authentication before taking critical actions.

This flaw allows low-privileged or unauthenticated requests to invoke profile verification logic intended only for trusted roles.

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Attack Scenarios

• Authenticated low-level users could mark arbitrary profiles as verified, enabling fraudulent payment or donation actions.
• Automated scanning tools might discover and exploit the vulnerable AJAX or REST endpoints en masse.
• Attackers may combine this with social engineering to manipulate payment flows or solicit unwarranted refunds.
• Exploit results could range from altered user trust flags to compromised financial workflows.

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Vulnerability Verification Steps

1. Check your Paytium plugin version in the WordPress dashboard or via WP-CLI: wp plugin get paytium --field=version.
2. If version ≤ 4.3.7, your site is vulnerable until updated.
3. Identify if vulnerable endpoints exist in your setup:
   • AJAX hook: wp_ajax_check_for_verified_profiles
   • REST routes under ‘paytium/v1’ namespace involving ‘verified-profiles’
4. Search access logs for suspicious calls:
   • admin-ajax.php?action=check_for_verified_profiles
   • REST requests to verified-profiles endpoints
5. Review plugin PHP code for missing nonce or capability checks around these endpoints.
6. Leverage security scanners (including Managed-WP’s tools) to detect related alerts.

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Stepwise Remediation

1. Backup: Take full backups of your database and site files before any changes.
2. Update the Plugin: Upgrade Paytium to 4.4 or later via the WordPress admin or WP-CLI.
3. Temporary Mitigation: If update isn’t immediately possible, deploy Managed-WP’s recommended WAF rules or virtual patches to block vulnerable endpoints.
4. Verify Fix: Confirm updated plugin enforces capability and nonce checks effectively.
5. Audit: Investigate logs and database for unauthorized changes to verified profiles or payment settings.
6. Credential Rotation: Rotate all admin passwords, API keys, and payment gateway credentials if compromise is suspected.
7. Monitoring: Enable ongoing log inspection and Managed-WP security alerting for anomalous activity.

Note: Plugin updates are definitive fixes; virtual patches should only be considered stopgap solutions.

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Responsible Manual Patch Example

If you cannot update immediately and require a temporary manual fix, insert appropriate authentication and authorization checks into the vulnerable AJAX handler. Test carefully on staging before production deployment.

// Original vulnerable function
function check_for_verified_profiles() {
    // Vulnerable logic...
    wp_send_json_success( ['message' => 'done'] );
}
add_action( 'wp_ajax_check_for_verified_profiles', 'check_for_verified_profiles' );

// Secured replacement function
function mwp_protect_check_for_verified_profiles() {
    // Verify nonce (adjust to your nonce name)
    if ( ! isset( $_REQUEST['nonce'] ) || ! wp_verify_nonce( sanitize_text_field( wp_unslash( $_REQUEST['nonce'] ) ), 'paytium_verify_profiles' ) ) {
        wp_send_json_error( ['message' => 'Forbidden - invalid nonce'], 403 );
    }

    // Capability check: admins or moderators only
    if ( ! current_user_can( 'manage_options' ) ) {
        wp_send_json_error( ['message' => 'Forbidden - insufficient permissions'], 403 );
    }

    $profile_id = isset( $_POST['profile_id'] ) ? intval( $_POST['profile_id'] ) : 0;
    if ( $profile_id  'Invalid profile id'], 400 );
    }

    // Continue safe verification logic...
    wp_send_json_success( ['message' => 'Profile verified'] );
}
remove_action( 'wp_ajax_check_for_verified_profiles', 'check_for_verified_profiles' );
add_action( 'wp_ajax_check_for_verified_profiles', 'mwp_protect_check_for_verified_profiles' );

Important Notes:

• Use proper nonce verification matching your frontend implementation.
• Choose capability checks appropriate to your site’s admin roles.
• Always sanitize and validate incoming input values.
• REST endpoints should implement analogous permission callbacks returning false for unauthorized requests.

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Temporary Mitigations with Managed-WP WAF

Until you can apply the vendor patch, Managed-WP recommends installing virtual patches via firewall rules that block unauthorized access to the vulnerable endpoints. Here are managed rule guidelines you can implement or request from your hosting security team:

1. Block AJAX action requests for check_for_verified_profiles
   • Block requests to admin-ajax.php where action=check_for_verified_profiles unless from authenticated admins or from whitelisted IPs.
2. Block REST API calls to Paytium’s verified profiles endpoints
   • Only allow calls from trusted admin sources with valid authentication tokens.
3. Rate-limit and throttle repeated suspicious requests
   • Implement temporary IP blocks on repeated malformed or probing requests.
4. ModSecurity Sample Rule (Adapt to your Environment)

   # Block calls to vulnerable Paytium AJAX action
   SecRule REQUEST_URI "@contains /wp-admin/admin-ajax.php" "phase:2,chain,deny,status:403,msg:'Blocked Paytium vulnerable action',id:1001001"
     SecRule ARGS:action "@streq check_for_verified_profiles" "t:none,chain"
     SecRule &REQUEST_HEADERS:Cookie "@gt 0" "t:none,chain"
     SecRule REQUEST_HEADERS:Cookie "!@rx wordpress_logged_in_[0-9a-fA-F_]+" "t:none"
   

5. Disable the Paytium plugin if feasible and safe
   • When immediate protective measures are unavailable, temporarily disable the plugin until patched.

Important: These virtual patches do not replace proper plugin updates.

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Detection and Forensic Recommendations

1. Scrutinize webserver logs for calls to suspicious AJAX or REST endpoints related to profile verification.
2. Check database for unexpected verified profile entries or admin users:
   • SELECT * FROM wp_usermeta WHERE meta_key LIKE '%verified%';
   • SELECT ID, user_login FROM wp_users WHERE ID IN (SELECT user_id FROM wp_usermeta WHERE meta_key = 'wp_capabilities' AND meta_value LIKE '%administrator%');
3. Audit plugin folder file modification times for unauthorized changes.
4. Scan for web shells and malicious files with your preferred malware scanner.
5. Review payment gateway and webhook configurations for suspicious modifications.
6. Apply WordPress audit trail plugins if available to track user activity during the suspected timeframe.
7. Preserve all evidence (logs, backups) prior to remediation steps.

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Security Hardening Guidelines

1. Enforce least privilege principles for sensitive plugin functionality.
2. Use nonces and REST API permission callbacks rigorously on all state-changing actions.
3. Sanitize and validate all user inputs on server side.
4. Disable or restrict plugin features and endpoints not required by your site.
5. Maintain updated plugins, themes, and WordPress core at all times.
6. Implement logging and continuous monitoring of authentication and admin actions.
7. Schedule regular security reviews and penetration testing.
8. Leverage Managed-WP’s WAF and rate limiting solutions to minimize attack vectors.

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Incident Response Playbook (Condensed)

1. Isolate: Place site into maintenance mode; block malicious IPs.
2. Snapshot: Secure full backups for forensics.
3. Contain: Apply WAF virtual patch rules and deactivate plugin if possible.
4. Eradicate: Remove malicious files; reinstall clean plugin version; remove unauthorized users.
5. Recover: Rotate credentials; validate infrastructure and payment workflows; re-enable site functions.
6. Post-Incident: Perform root cause analysis and strengthen security controls.

Coordinate with payment providers if donation/payment data integrity is critical.

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How Managed-WP Supports Your WordPress Security

Robust Firewall and Managed Vulnerability Mitigations

Managed-WP offers industry-leading Web Application Firewall (WAF) services that understand WordPress plugin vulnerabilities and automatically apply virtual patches to block attacks like CVE-2023-7290. Our specialized onboarding and continuous threat response ensure your site stays protected from emerging risks.

Key benefits include:

• Automatic virtual patching and customizable role-based traffic filters
• Personalized onboarding with guided site security checklists
• Real-time monitoring, incident alerts, and expert remediation support
• Actionable best practices for secrets management and user role hardening

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Practical Checklist – What to Do Now

1. Confirm your Paytium plugin version. Upgrade to 4.4+ immediately if vulnerable.
2. Backup your entire site and database before any changes.
3. If you cannot update now, deploy Managed-WP WAF rules to block vulnerable endpoints:
   • Block admin-ajax.php?action=check_for_verified_profiles
   • Block REST API calls related to verified profiles
   • Implement rate limiting and IP blocking for suspicious activity
4. Inspect logs and user profiles for signs of exploitation.
5. Rotate credentials if you detect any suspicious behavior.
6. After patching, test site functionality on staging thoroughly.
7. Continue monitoring and enforce plugin security best practices.

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Final Security Insights from Managed-WP

Broken access control vulnerabilities, while often perceived as “low” risk, represent a substantial threat to WordPress environments—especially plugins involved in payment and donation workflows. Even simple missing authorization checks can expose your business to fraud, trust violations, and financial loss.

We urge site owners to treat Paytium CVE-2023-7290 with urgency: patch promptly, deploy virtual patches if needed, and adopt Managed-WP’s comprehensive security approach for ongoing protection.

If you require assistance implementing mitigations or performing forensic scans, Managed-WP’s expert team is here to help. Our free tier firewall offers immediate baseline protection, while our paid plans provide advanced automation and rapid incident response.

Secure your WordPress site effectively — your reputation and revenue depend on it.

Stay vigilant,
Managed-WP Security Team

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Appendix: Useful Commands & Queries

• Check plugin version:
  wp plugin get paytium --field=version
• Search access logs:
  grep "admin-ajax.php" /var/log/nginx/access.log | grep "check_for_verified_profiles"
• Find recently modified files:
  find wp-content/plugins/paytium -type f -mtime -30 -ls
• Search for verified meta keys:
  SELECT * FROM wp_usermeta WHERE meta_key LIKE '%verified%';
• Check for new administrator accounts:
  SELECT ID, user_login FROM wp_users WHERE ID IN (SELECT user_id FROM wp_usermeta WHERE meta_key = 'wp_capabilities' AND meta_value LIKE '%administrator%');

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Resources and References for Administrators

• Review Paytium’s official changelog for version 4.4 fixes.
• Always validate updates first on staging environments.
• Adapt Managed-WP’s virtual patch examples to your firewall platform or ModSecurity ruleset.

Note: This post intentionally excludes exploit code or detailed attack instructions to prioritize responsible disclosure and site defense.

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