Overview
A significant security vulnerability, identified as CVE-2025-13312, has been discovered in the CRM Memberships plugin for WordPress. This flaw allows unauthenticated attackers to create arbitrary membership tags and potentially modify CRM configuration. The vulnerability stems from a missing capability check in the ntzcrm_add_new_tag function. All versions of the plugin up to and including version 2.5 are affected. This poses a serious risk to websites using the plugin, as attackers can leverage this vulnerability to manipulate membership management and potentially gain unauthorized access or control.
Technical Details
The vulnerability resides in the ntzcrm_add_new_tag function within the CRM Memberships plugin. Specifically, the function lacks a proper capability check to verify if the user attempting to create a new tag has the necessary privileges. This allows unauthenticated users to directly call this function and create new tags, bypassing the intended access controls.
The relevant code snippets can be found in the following files (available on the WordPress plugin repository’s code browser):
class-ntzcrm-api.php– Definition of thentzcrm_add_new_tagfunctionclass-ntzcrm-api.php– Context where the function may be called
An attacker can exploit this by sending a crafted request to the WordPress site, triggering the ntzcrm_add_new_tag function without proper authentication. This allows them to inject arbitrary tag names and associated data, leading to unauthorized modification of membership data and potentially other CRM configuration settings.
CVSS Analysis
This vulnerability has been assigned a CVSS score of 5.3 (Medium). The CVSS vector string is not publicly available but the score reflects the following characteristics:
- Attack Vector (AV): Network (N) – The vulnerability can be exploited over a network.
- Attack Complexity (AC): Low (L) – The conditions for successful exploitation are easily met.
- Privileges Required (PR): None (N) – No privileges are required to exploit the vulnerability.
- User Interaction (UI): None (N) – No user interaction is required to exploit the vulnerability.
- Scope (S): Unchanged (U) – An exploited vulnerability can only affect resources managed by the same security authority.
- Confidentiality Impact (C): None (N) – There is no impact to confidentiality.
- Integrity Impact (I): Low (L) – There is a limited impact to integrity.
- Availability Impact (A): None (N) – There is no impact to availability.
Possible Impact
The exploitation of CVE-2025-13312 can have the following impacts:
- Unauthorized Membership Tag Creation: Attackers can create arbitrary membership tags, potentially disrupting membership management processes.
- CRM Configuration Modification: The ability to create tags might be used to indirectly modify other CRM configuration settings that rely on or are associated with membership tags.
- Data Manipulation: By creating misleading or malicious tags, attackers could potentially manipulate user data or membership status.
- SEO Spam: injected membership tags could expose the site to SEO Spam.
Mitigation and Patch Steps
The most effective way to mitigate this vulnerability is to update the CRM Memberships plugin to the latest available version. If an update is not yet available, consider the following:
- Disable the Plugin: As a temporary measure, disable the CRM Memberships plugin until a patched version is released. This will prevent attackers from exploiting the vulnerability.
- Web Application Firewall (WAF) Rules: Implement WAF rules to detect and block suspicious requests targeting the
ntzcrm_add_new_tagfunction. Contact your WAF vendor for specific rule recommendations. - Monitor Website Activity: Closely monitor your website’s activity logs for any signs of unauthorized tag creation or suspicious requests to the CRM Memberships plugin.
