The Dealia – Request a quote plugin for WordPress suffers from a missing authorization vulnerability (CWE-862) identified as CVE-2026-2504. The core issue lies in the plugin's AJAX handlers within AdminSettingsController.php, which verify the admin nonce (DEALIA_ADMIN_NONCE) but fail to check whether the requesting user has the 'manage_options' capability, a privilege typically reserved for administrators. The nonce itself is exposed to all users with the 'edit_posts' capability (Contributor role and above) via wp_localize_script() in PostsController.php, effectively allowing contributors and higher roles to access it. Since the AJAX handlers do not enforce proper capability checks, an authenticated user with contributor-level access can invoke these handlers to reset the plugin configuration without authorization. This vulnerability does not affect confidentiality or availability directly but impacts integrity by allowing unauthorized modification of plugin settings. The CVSS 3.1 base score is 4.3 (medium), reflecting low complexity of attack (AC:L), network vector (AV:N), and limited impact on integrity (I:L) without affecting confidentiality or availability. No user interaction is required (UI:N), and the scope remains unchanged (S:U). No patches are currently linked, and no known exploits have been reported in the wild as of the publication date.

For European organizations, this vulnerability can lead to unauthorized changes in the Dealia plugin configuration by users with contributor-level access, potentially disrupting business processes relying on the plugin's functionality, such as quote requests or customer interactions. While it does not directly expose sensitive data or cause denial of service, unauthorized configuration changes could degrade service quality, introduce misconfigurations, or open avenues for further exploitation if combined with other vulnerabilities. Organizations with multi-user WordPress environments where contributors or editors have authenticated access are particularly at risk. This may affect e-commerce, customer service, or lead generation websites using the plugin. The impact is more pronounced in sectors where website integrity and customer interaction workflows are critical, such as retail, professional services, and public sector websites. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially if attackers discover or develop exploit code.

Immediate mitigation involves restricting contributor-level users from accessing or invoking the vulnerable AJAX handlers. Site administrators should audit user roles and capabilities to ensure only trusted users have edit_posts or higher privileges. Implement custom capability checks or filters to enforce 'manage_options' capability on AJAX endpoints if patching is not yet available. Monitoring and logging AJAX requests related to the plugin can help detect suspicious activity. If possible, temporarily disable the Dealia – Request a quote plugin until a patched version is released. Additionally, consider applying Web Application Firewall (WAF) rules to block unauthorized AJAX requests targeting the plugin's endpoints. Regularly update WordPress core and plugins, and subscribe to vendor advisories for patch releases. Educate site administrators about the risks of granting elevated privileges to contributors and enforce the principle of least privilege.