CVE-2025-13747 is a stored Cross-Site Scripting (XSS) vulnerability identified in the NewStatPress plugin for WordPress, affecting all versions up to and including 1.4.3. The vulnerability stems from improper neutralization of input during web page generation, specifically within the nsp_shortcode function. This function inadequately sanitizes and escapes user-supplied attributes, allowing authenticated users with contributor-level or higher privileges to inject arbitrary JavaScript code into pages. Because the malicious script is stored, it executes every time a user accesses the compromised page, potentially enabling attackers to hijack user sessions, steal cookies, perform actions on behalf of users, or deface the website. The CVSS 3.1 base score is 6.4, reflecting a medium severity level, with an attack vector of network, low attack complexity, requiring privileges (PR:L), no user interaction, and a scope change (S:C). The vulnerability impacts confidentiality and integrity but not availability. No public exploits are known at this time, but the vulnerability's presence in a widely used WordPress plugin makes it a significant concern. The lack of a patch link indicates that a fix may not yet be available, emphasizing the need for interim mitigations. The vulnerability is cataloged under CWE-79, which covers improper neutralization of input leading to XSS attacks.

For European organizations, this vulnerability poses a moderate risk primarily to websites using the NewStatPress plugin on WordPress, especially those that allow contributor-level users to add or edit content. Exploitation can lead to unauthorized script execution, resulting in session hijacking, theft of sensitive information, or unauthorized actions performed under the guise of legitimate users. This can damage organizational reputation, lead to data breaches, and potentially facilitate further attacks such as privilege escalation or lateral movement within the web infrastructure. Given the widespread use of WordPress across Europe, including government, educational, and commercial sectors, the impact could be significant if exploited at scale. The vulnerability does not affect availability directly but compromises confidentiality and integrity, which are critical for trust and compliance with data protection regulations such as GDPR. Organizations with multi-user content management workflows are particularly at risk, as contributor-level access is commonly granted to content creators and editors.

1. Monitor for an official patch from the NewStatPress plugin vendor and apply it immediately upon release. 2. Until a patch is available, restrict contributor-level and higher access to trusted users only, minimizing the risk of malicious script injection. 3. Implement additional input validation and output escaping at the application or web server level to sanitize user-supplied attributes in shortcodes. 4. Employ Web Application Firewalls (WAFs) with rules to detect and block typical XSS payloads targeting the plugin's shortcode functionality. 5. Conduct regular security audits and code reviews of WordPress plugins and themes to identify similar vulnerabilities. 6. Educate content contributors about the risks of injecting untrusted content and enforce strict content submission policies. 7. Enable Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on web pages. 8. Maintain up-to-date backups of website content to enable recovery in case of compromise.