Unauthorized Data Modification in Checkout Mestres for WooCommerce by WordPress

CVE-2025-2266

What is CVE-2025-2266?

CVE-2025-2266 is a vulnerability affecting the Checkout Mestres for WooCommerce plugin used in WordPress websites. This plugin is designed to enhance the checkout process for e-commerce sites operating on the WooCommerce platform. The vulnerability stems from a missing capability check within the cwmpUpdateOptions() function, allowing unauthorized users to modify critical data on affected WordPress sites. Consequently, this could lead to severe security risks including privilege escalation, enabling attackers to adjust user roles and gain administrative access without proper authorization.

Technical Details

The vulnerability is present in versions 8.6.5 to 8.7.5 of the Checkout Mestres for WooCommerce plugin. Specifically, the flaw arises due to inadequate validation checks when updating site options, permitting unauthorized modifications. Attackers can exploit this weakness to alter the default registration role to 'administrator', further allowing them to enable user registration capabilities. As a result, an unauthenticated individual could effectively assume control of the vulnerable site.

Potential Impact of CVE-2025-2266

1. Unauthorized Admin Access: Attackers can gain admin rights on compromised sites, significantly escalating the risks of further malicious activities, including the installation of backdoors or other compromised plugins.

2. Data Integrity Compromise: Modifications made through the vulnerability can lead to unauthorized changes in site configurations, impacting the integrity and reliability of user and transaction data.

3. Loss of Consumer Trust: A breach resulting from this vulnerability can severely damage the reputation of an organization, leading to loss of customer trust and potential revenue decline, especially in e-commerce environments where confidence is critical.

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