CVE-2026-1447 identifies a Cross-Site Request Forgery (CSRF) vulnerability in the Mail Mint plugin for WordPress, versions up to and including 1.19.2. The root cause is the absence of nonce validation in the create_or_update_note function, which is responsible for creating or updating contact notes within the plugin. Nonce validation is a critical security mechanism in WordPress that prevents unauthorized commands from being executed via forged requests. Without this protection, an attacker can craft a malicious link or request that, when clicked or triggered by an authenticated site administrator, causes unintended modifications to contact notes. Furthermore, the plugin fails to properly sanitize and escape user inputs in these notes, leading to stored Cross-Site Scripting (XSS) vulnerabilities. Stored XSS can allow attackers to execute arbitrary JavaScript in the context of the administrator's browser, potentially leading to session hijacking, privilege escalation, or further compromise of the WordPress site. The vulnerability requires user interaction (the administrator must be tricked into clicking a malicious link), but no prior authentication is necessary for the attacker. The CVSS 3.1 base score is 5.4 (medium severity), reflecting the moderate impact on confidentiality and integrity, no impact on availability, and the requirement for user interaction. No patches are currently linked, and no known exploits have been reported in the wild. This vulnerability affects all versions of the Mail Mint plugin up to 1.19.2, which is commonly used for newsletters, email marketing, automation, WooCommerce emails, and post notifications, making it relevant for e-commerce and marketing-focused WordPress sites.

For European organizations, this vulnerability poses a risk primarily to the confidentiality and integrity of customer and contact data managed through the Mail Mint plugin. Attackers exploiting this flaw can manipulate contact notes, potentially injecting malicious scripts that compromise administrator sessions or lead to further site compromise. This can result in unauthorized data access, defacement, or disruption of marketing communications. Organizations relying heavily on WooCommerce and email marketing automation are particularly vulnerable, as compromised contact data can affect customer trust and regulatory compliance, especially under GDPR. The requirement for user interaction limits mass exploitation but targeted phishing campaigns against administrators could be effective. The absence of known active exploits reduces immediate risk, but the medium severity score indicates that timely mitigation is important to prevent escalation. The impact on availability is negligible, but the potential for stored XSS elevates the threat to data integrity and confidentiality.

European organizations should implement the following specific mitigations: 1) Monitor for updates from getwpfunnels and apply patches promptly once available to address nonce validation and input sanitization issues. 2) In the interim, consider disabling or restricting access to the create_or_update_note functionality or the Mail Mint plugin if feasible. 3) Employ Web Application Firewalls (WAFs) with custom rules to detect and block suspicious CSRF attempts targeting the vulnerable endpoints. 4) Educate site administrators about phishing and social engineering risks to reduce the likelihood of clicking malicious links. 5) Conduct regular security audits and code reviews of WordPress plugins to identify similar vulnerabilities proactively. 6) Implement Content Security Policy (CSP) headers to mitigate the impact of stored XSS by restricting script execution sources. 7) Ensure that all user inputs in contact notes and related fields are sanitized and escaped properly, either by plugin updates or custom code fixes. 8) Maintain robust backup and incident response plans to recover quickly if exploitation occurs.