CVE-2026-9004 in WP-CRM System Plugin
Summary
by MITRE • 09/22/2026
The WP-CRM System – Manage Clients and Projects plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 3.4.6 via the 'contact_id' parameter. This makes it possible for authenticated attackers, with contributor-level access and above, to extract full names, email addresses, phone numbers, mobile numbers, fax numbers, and physical address information of arbitrary CRM contact records by enumerating the contact_id parameter.
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Analysis
by VulDB Data Team • 09/22/2026
The WP-CRM System plugin, a widely utilized tool for managing client data and project workflows within WordPress environments, contains a critical vulnerability in versions up to 3.4.6 that allows for the unauthorized exposure of sensitive personal information. This flaw is rooted in an insecure direct object reference mechanism affecting the contact_id parameter used by the application to retrieve specific CRM records. The vulnerability stems from insufficient access control checks on the server side when processing requests related to individual contacts, allowing authenticated users with relatively low privilege levels to manipulate input parameters and access data belonging to other entities within the system.
The technical nature of this flaw aligns closely with CWE-200, which categorizes exposure of sensitive information through improper handling or lack of authorization checks on API endpoints or internal functions. Specifically, it also reflects characteristics of CWE-639, where an attacker can bypass access control by manipulating object references such as identifiers in URLs or form parameters. In this scenario, the application fails to verify whether the authenticated user requesting a specific contact record has legitimate permission to view that particular resource based on their role and ownership relationships within the CRM database.
The operational impact of this vulnerability is significant for organizations relying on WP-CRM System for customer relationship management. An attacker with contributor-level access or higher, which are common roles assigned to content editors or junior staff members, can systematically enumerate contact identifiers to extract a comprehensive set of personally identifiable information. This includes full names, email addresses, phone numbers, mobile numbers, fax numbers, and physical addresses. The ability to scrape this data en masse poses severe risks including identity theft, targeted phishing campaigns, social engineering attacks, and potential violations of privacy regulations such as GDPR or CCPA due to the unauthorized disclosure of personal data.
From a threat intelligence perspective, this vulnerability facilitates reconnaissance activities that are consistent with ATT&CK technique T1087, specifically account discovery through local system queries. By enumerating valid contact IDs, an attacker can map out the organizational structure and identify high-value targets within the client database. This information gathering phase is often a precursor to more destructive actions such as credential stuffing or business email compromise attacks, making the remediation of this issue urgent for maintaining overall security posture.
To mitigate this vulnerability, administrators should immediately update the WP-CRM System plugin to version 3.4.7 or later, where these access control checks have been corrected. Until an upgrade is feasible, implementing additional server-side controls such as web application firewall rules that monitor and restrict unusual patterns of contact_id enumeration can provide temporary protection. Furthermore, organizations should review their WordPress user role assignments to ensure that contributor-level accounts are granted only the minimum necessary permissions required for their job functions, thereby reducing the attack surface available to potential insiders or compromised low-privilege accounts. Regular auditing of plugin code and adherence to secure coding practices that enforce strict object authorization checks on all data retrieval operations are essential preventive measures against similar flaws in future updates.