CVE-2025-13729 is a stored Cross-Site Scripting (XSS) vulnerability identified in the Entry Views plugin for WordPress, developed by greenshady. This vulnerability arises from insufficient sanitization and escaping of user-supplied attributes within the plugin's 'entry-views' shortcode. Specifically, authenticated users with contributor-level permissions or higher can inject arbitrary JavaScript code into WordPress pages by manipulating shortcode attributes. When other users access these pages, the malicious scripts execute in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim. The vulnerability affects all versions up to and including 1.0.0 of the plugin. The CVSS 3.1 base score is 6.4, reflecting a medium severity with network attack vector, low attack complexity, and requiring privileges but no user interaction. The scope is changed, indicating that the vulnerability can affect resources beyond the initially compromised component. No public exploits have been reported yet, but the risk remains significant due to the widespread use of WordPress and the plugin's functionality. The vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation leading to XSS. The lack of patch links suggests that a fix may not yet be available, emphasizing the need for immediate mitigation steps.

For European organizations, this vulnerability poses a moderate risk primarily to websites running WordPress with the Entry Views plugin installed. The ability for contributors to inject persistent malicious scripts can lead to compromised user sessions, theft of sensitive information such as cookies or credentials, and potential defacement or redirection attacks. This can damage organizational reputation, lead to data breaches, and violate data protection regulations such as GDPR if personal data is exposed. The impact is heightened in organizations relying on user-generated content or collaborative publishing workflows where contributor roles are common. Additionally, the scope change in the CVSS vector indicates that the vulnerability could affect multiple users or systems beyond the initial injection point, increasing the potential damage. Although no known exploits are currently in the wild, the ease of exploitation by authenticated users and the widespread use of WordPress in Europe make this a relevant threat. The vulnerability does not affect availability but compromises confidentiality and integrity of affected sites.

1. Immediately audit WordPress sites for the presence of the Entry Views plugin and identify versions in use. 2. Restrict contributor-level access to trusted users only, minimizing the risk of malicious shortcode injection. 3. Implement strict input validation and output escaping for all shortcode attributes, either by applying vendor patches when available or by custom hardening of the plugin code. 4. Monitor web server and application logs for unusual shortcode usage or unexpected script injections. 5. Employ Web Application Firewalls (WAFs) with rules targeting XSS payloads in shortcode parameters to block exploitation attempts. 6. Educate content contributors about the risks of injecting untrusted content and enforce content submission policies. 7. Regularly update WordPress core, plugins, and themes to incorporate security fixes. 8. Consider disabling or replacing the Entry Views plugin if a timely patch is not available. 9. Conduct periodic security assessments and penetration tests focusing on user input handling in WordPress environments.