CVE-2025-9885 is a Cross-Site Request Forgery (CSRF) vulnerability affecting the MPWizard – Create Mercado Pago Payment Links plugin for WordPress, specifically all versions up to and including 1.2.1. The vulnerability arises from missing or incorrect nonce validation in the '/includes/admin/class-mpwizard-table.php' file. Nonces in WordPress are security tokens used to verify that requests intended to perform sensitive actions originate from legitimate users and not from malicious third-party sites. The absence or improper implementation of nonce validation allows an unauthenticated attacker to craft a malicious request that, when executed by an authenticated site administrator (e.g., by clicking a link or visiting a malicious webpage), can trigger unauthorized actions such as deleting arbitrary posts on the WordPress site. This attack vector leverages the trust relationship between the administrator's browser session and the WordPress backend, exploiting the administrator's authenticated state to perform unintended operations. The vulnerability does not require the attacker to have any privileges or direct access to the site, but it does require user interaction from an administrator. The CVSS v3.1 base score is 4.3, reflecting a medium severity level, with the vector indicating network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:N), user interaction required (UI:R), unchanged scope (S:U), no confidentiality impact (C:N), low integrity impact (I:L), and no availability impact (A:N). No known exploits are currently reported in the wild, and no patches have been linked yet. This vulnerability falls under CWE-352, a common web application security weakness related to CSRF attacks.

For European organizations using WordPress sites with the MPWizard plugin, this vulnerability poses a risk primarily to the integrity of website content. An attacker could trick an administrator into executing a malicious request that deletes posts, potentially disrupting business operations, damaging brand reputation, or causing loss of critical content. While the vulnerability does not directly compromise confidentiality or availability, the unauthorized deletion of posts can lead to data loss and operational disruption. Organizations relying on their WordPress sites for e-commerce, marketing, or customer engagement could experience negative impacts on user trust and revenue. Since the attack requires administrator interaction, the risk can be mitigated by user awareness, but the ease of exploitation (low complexity) and the lack of required privileges increase the threat level. Additionally, if the plugin is used in environments handling sensitive payment links or financial transactions via Mercado Pago, unauthorized content manipulation could indirectly affect transactional integrity or customer experience. The lack of a patch at this time means organizations must rely on compensating controls until an official fix is released.

1. Immediate mitigation should include disabling or uninstalling the MPWizard plugin until a security patch is available. 2. Implement strict administrative user training to recognize and avoid clicking suspicious links or visiting untrusted websites while logged into the WordPress admin panel. 3. Employ Web Application Firewalls (WAFs) with rules designed to detect and block CSRF attack patterns targeting the plugin's endpoints. 4. Enforce multi-factor authentication (MFA) for all WordPress administrators to reduce the risk of session hijacking and unauthorized access. 5. Monitor WordPress logs for unusual post deletion activities and set up alerts for suspicious administrative actions. 6. Regularly back up WordPress content and database to enable quick restoration in case of data loss. 7. Once available, promptly apply official patches or updates from laudanumsoft addressing this vulnerability. 8. Consider implementing custom nonce validation or additional CSRF protections at the web server or application level as an interim safeguard.