CVE-2026-1925: 
WordPress vulnerability analysis and mitigation

CVE-2026-1925 is a missing authorization vulnerability in the EmailKit – Email Customizer for WooCommerce & WP plugin for WordPress. It affects all versions up to and including 1.6.2, allowing authenticated attackers with Subscriber-level access or above to modify the title of any post, page, or custom post type on the site. The vulnerability was published on February 18, 2026, and carries a CVSS v3.1 base score of 4.3 (Medium) (Red Hat CVE).

The root cause is a missing capability check (CWE-862: Missing Authorization) on the update_template_data function within the EmailKit plugin. Because no authorization check is enforced before executing this function, any authenticated user — even those with minimal privileges such as Subscriber — can invoke it over the network with low attack complexity and no user interaction required. This allows unauthorized modification of post titles across all post types managed by WordPress (Red Hat CVE, Infinit Sec).

Exploitation results in unauthorized modification of post, page, and custom post type titles across the affected WordPress site, impacting content integrity. There is no confidentiality or availability impact, and the scope is limited to the affected WordPress installation. While not directly enabling lateral movement or data exfiltration, content tampering could be leveraged for defacement, misinformation, or social engineering attacks targeting site visitors (Red Hat CVE).

No public exploit code or active in-the-wild exploitation has been reported for CVE-2026-1925 as of the available data. The EPSS score is approximately 0.026%, indicating a low probability of exploitation in the near term. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities (KEV) catalog. Exploitation requires at minimum a valid Subscriber-level account on the target WordPress site (Red Hat CVE).

1. Reconnaissance: Identify WordPress sites running the EmailKit plugin version 1.6.2 or earlier, using tools like WPScan or by inspecting plugin directories.
2. Obtain Subscriber Access: Register for a free account on the target WordPress site (if open registration is enabled) or use existing low-privilege credentials.
3. Craft Malicious Request: Send an authenticated HTTP POST request to the WordPress AJAX endpoint (e.g., wp-admin/admin-ajax.php) invoking the update_template_data function with a target post ID and a modified title value.
4. Modify Post Title: The server processes the request without verifying the caller's authorization, updating the title of the specified post, page, or custom post type to the attacker-supplied value (Infinit Sec).

• Logs: WordPress access logs showing authenticated POST requests to wp-admin/admin-ajax.php with the update_template_data action from low-privilege user accounts.
• Logs: Unexpected post title changes recorded in the WordPress revision history or audit logs, particularly from Subscriber-level users.
• Network: Repeated or scripted AJAX requests targeting the update_template_data action from the same IP or user account in a short time window.

Users should update the EmailKit – Email Customizer for WooCommerce & WP plugin to a version beyond 1.6.2 that includes a proper capability check on the update_template_data function. As a temporary workaround, site administrators can disable the plugin until a patched version is available, or restrict user registration to prevent untrusted Subscriber-level accounts. Regularly auditing WordPress user roles and limiting open registration reduces the attack surface (Red Hat CVE, Infinit Sec).