CVE-2026-56030: Paytium Privilege Escalation Flaw

CVE-2026-56030 Overview

CVE-2026-56030 is an unauthenticated privilege escalation vulnerability affecting the Paytium WordPress plugin in versions up to and including 5.0.2. The flaw is classified under [CWE-266: Incorrect Privilege Assignment] and allows remote attackers to gain elevated privileges without authentication. Paytium is a WordPress plugin used to accept Mollie payments and donations on WordPress sites. Because the attack requires no authentication and can be executed over the network, any site running a vulnerable version is exposed to takeover risk.

Critical Impact
Unauthenticated remote attackers can escalate privileges on WordPress sites running Paytium <= 5.0.2, potentially leading to full site compromise.

Affected Products

Paytium WordPress plugin versions <= 5.0.2
WordPress sites accepting Mollie payments through Paytium
Any WordPress installation with a vulnerable Paytium plugin active

Discovery Timeline

2026-06-26 - CVE-2026-56030 published to the National Vulnerability Database (NVD)
2026-06-26 - Last updated in NVD database

Technical Details for CVE-2026-56030

Vulnerability Analysis

CVE-2026-56030 is a privilege escalation weakness in the Paytium WordPress plugin. The vulnerability is categorized under [CWE-266], indicating that the application assigns privileges to a user or process in a manner inconsistent with the intended security model. An unauthenticated attacker can leverage this flaw over the network to obtain higher privileges than intended. Successful exploitation impacts confidentiality, integrity, and availability of the target WordPress installation. Once privileges are elevated, an attacker can perform administrative actions, modify site content, install malicious plugins, or exfiltrate customer and payment-related data.

Root Cause

The root cause is incorrect privilege assignment [CWE-266] within Paytium plugin logic through version 5.0.2. The plugin fails to enforce proper authorization or capability checks on privileged operations. As a result, requests originating from unauthenticated sources are processed with privileges they should not have. Refer to the Patchstack WordPress Vulnerability advisory for further technical context.

Attack Vector

The attack vector is network-based and requires no authentication or user interaction. An attacker sends crafted HTTP requests to a WordPress site running the vulnerable Paytium plugin. These requests exercise the privileged plugin functionality without the expected capability checks. The outcome is elevation of privileges within the WordPress environment, which can be used to pivot toward full administrative control.

No public proof-of-concept exploit code has been verified at the time of publication. The vulnerability mechanism is described in prose because verified exploit code is not available.

Detection Methods for CVE-2026-56030

Indicators of Compromise

Unexpected creation of new WordPress administrator or elevated-role accounts
Unauthorized modification of plugin, theme, or user role settings
Anomalous POST requests to Paytium plugin endpoints under /wp-content/plugins/paytium/ or admin-ajax.php actions related to Paytium
New or altered scheduled tasks, options, or capabilities in the wp_options and wp_usermeta tables

Detection Strategies

Inventory WordPress sites and identify any deployment of the Paytium plugin at version <= 5.0.2
Review web server access logs for unauthenticated requests targeting Paytium AJAX or REST endpoints
Alert on privilege changes and new administrator account creation events in WordPress audit logs
Correlate outbound traffic from web servers with known malicious infrastructure following suspicious plugin activity

Monitoring Recommendations

Enable a WordPress activity or audit logging plugin to capture user role and capability changes
Forward web server and WordPress logs to a centralized log platform for retention and analysis
Monitor file integrity for wp-content/plugins/paytium/ and core WordPress files
Track HTTP 200 responses on Paytium endpoints from unauthenticated sessions in short time windows

How to Mitigate CVE-2026-56030

Immediate Actions Required

Identify all WordPress instances running Paytium <= 5.0.2 across the environment
Update Paytium to a fixed version as published by the vendor once available
Deactivate and remove the Paytium plugin if a patched version is not yet deployable
Rotate WordPress administrator credentials and audit user roles after remediation

Patch Information

Refer to the Patchstack WordPress Vulnerability advisory for the latest vendor patch status and fixed version details. Apply the vendor-supplied update as soon as it is available. Verify plugin version after upgrade to confirm the vulnerable release is no longer active.

Workarounds

Disable the Paytium plugin until an official patched version can be installed
Restrict access to /wp-admin/ and admin-ajax.php using web application firewall (WAF) rules or IP allowlisting
Apply virtual patching rules at the WAF to block requests targeting Paytium plugin endpoints from unauthenticated sources
Enforce least privilege on WordPress accounts and review capabilities assigned by installed plugins

bash

# Configuration example: identify Paytium plugin version via WP-CLI
wp plugin list --name=paytium --fields=name,status,version

# Deactivate the vulnerable plugin as an interim workaround
wp plugin deactivate paytium