CVE-2025-13727 is a stored cross-site scripting (XSS) vulnerability classified under CWE-79 found in the Video Share VOD – Turnkey Video Site Builder Script plugin for WordPress. This vulnerability affects all versions up to and including 2.7.11. The root cause is insufficient sanitization and escaping of user input within the plugin’s settings interface, which allows authenticated users with editor-level permissions or higher to inject arbitrary JavaScript code. The vulnerability manifests in multisite WordPress installations or those where the unfiltered_html capability is disabled, limiting the attack surface but still posing a significant risk. When a malicious script is injected, it is stored persistently and executed whenever any user visits the affected page, potentially enabling session hijacking, privilege escalation, or other malicious activities. The CVSS 3.1 base score is 4.4, indicating medium severity, with the vector reflecting network attack vector, high attack complexity, high privileges required, no user interaction needed, and a scope change. No public exploits are currently known, but the vulnerability’s presence in a popular WordPress plugin used for video content delivery makes it a concern for organizations relying on this software. The vulnerability’s exploitation requires authenticated access with elevated privileges, which somewhat limits the risk but does not eliminate it, especially in environments with multiple editors or contributors. The lack of available patches at the time of reporting necessitates immediate mitigation efforts by administrators.

For European organizations, this vulnerability poses a moderate risk primarily to websites and platforms using the Video Share VOD plugin in multisite WordPress environments. Successful exploitation can lead to the execution of arbitrary scripts in the context of the affected site, potentially compromising user sessions, stealing sensitive information, or enabling further attacks such as privilege escalation or defacement. This can damage organizational reputation, lead to data breaches involving personal data protected under GDPR, and disrupt service availability indirectly through malicious payloads. The impact is heightened in sectors with high reliance on video content delivery, such as media companies, educational institutions, and entertainment platforms. Since exploitation requires editor-level access, insider threats or compromised editor accounts increase risk. The vulnerability’s presence in multisite installations is particularly concerning for organizations managing multiple sites under a single WordPress instance, as a single injection can affect multiple domains or subdomains. Overall, the threat could lead to confidentiality and integrity breaches but is unlikely to cause direct availability loss.

1. Restrict editor-level permissions strictly to trusted users and regularly audit user roles and capabilities to minimize the risk of malicious insiders or compromised accounts. 2. Implement strong authentication mechanisms such as multi-factor authentication (MFA) for all users with elevated privileges to reduce the likelihood of account compromise. 3. Monitor plugin settings and content pages for unexpected or suspicious script tags or inline JavaScript, using automated scanning tools or manual reviews. 4. If possible, temporarily disable or limit the use of the Video Share VOD plugin in multisite environments until a vendor patch or update is released. 5. Apply web application firewall (WAF) rules to detect and block common XSS payloads targeting this plugin’s settings interface. 6. Educate content editors about the risks of injecting untrusted content and enforce strict content input validation policies. 7. Regularly update WordPress core and plugins to the latest versions once patches addressing this vulnerability become available. 8. Consider isolating multisite installations or segmenting sites to limit the scope of potential compromise. 9. Review and adjust the unfiltered_html capability settings carefully, balancing functionality and security needs.