CVE-2025-4100 is a stored cross-site scripting vulnerability identified in the Nautic Pages plugin for WordPress, specifically within the 'np_marinetraffic_map' shortcode. This vulnerability stems from insufficient sanitization and escaping of user-supplied attributes, allowing authenticated users with contributor-level permissions or higher to inject arbitrary JavaScript code into pages. When other users access these pages, the injected scripts execute in their browsers, potentially compromising session tokens, cookies, or enabling unauthorized actions such as privilege escalation or data theft. The vulnerability affects all versions up to and including 2.0 of the plugin. The attack vector is remote over the network, requiring authenticated access but no user interaction for exploitation. The CVSS 3.1 score of 6.4 reflects medium severity, with confidentiality and integrity impacts but no availability impact. No patches or known exploits are currently documented, but the vulnerability poses a significant risk to websites using this plugin, especially those with multiple contributors. The scope is limited to WordPress sites running the affected plugin, but the impact can be broad if exploited in high-traffic or sensitive environments.

The impact of CVE-2025-4100 includes potential compromise of user sessions, theft of sensitive information, and unauthorized actions performed on behalf of users viewing the injected pages. Since the vulnerability allows stored XSS, malicious scripts persist on the site and affect all visitors to the compromised pages, increasing the attack surface. Organizations relying on the Nautic Pages plugin may face reputational damage, data breaches, and loss of user trust. The requirement for contributor-level access limits the attacker pool but still presents a risk in environments with multiple content editors or contributors. The vulnerability does not affect availability but can lead to confidentiality and integrity breaches. Exploitation could facilitate further attacks such as phishing, malware distribution, or lateral movement within the network if combined with other vulnerabilities.

To mitigate CVE-2025-4100, organizations should immediately update the Nautic Pages plugin to a patched version once available. In the absence of a patch, restrict contributor-level access to trusted users only and audit existing content for injected scripts. Implement Web Application Firewall (WAF) rules to detect and block suspicious input patterns targeting the 'np_marinetraffic_map' shortcode attributes. Employ Content Security Policy (CSP) headers to limit the execution of unauthorized scripts on affected pages. Additionally, sanitize and validate all user inputs at the application level, and ensure output encoding is applied consistently. Regularly monitor logs for anomalous activities related to plugin usage. Educate content contributors about the risks of injecting untrusted content and enforce strict role-based access controls to minimize exposure.