CVE-2025-10129 is a stored cross-site scripting vulnerability identified in the WordPress Live Webcam Widget & Shortcode plugin, which is widely used to embed live webcam feeds on WordPress sites. The vulnerability arises from improper neutralization of user-supplied input in the 'webcam' shortcode attribute processing, specifically due to insufficient input sanitization and lack of output escaping. This flaw allows authenticated users with contributor-level permissions or higher to inject arbitrary JavaScript code that is stored persistently within the website's content. When other users visit the affected pages, the malicious scripts execute in their browsers, potentially compromising session cookies, redirecting users to malicious sites, or performing actions on behalf of the victim. The vulnerability has a CVSS 3.1 base score of 6.4, reflecting medium severity with network attack vector, low attack complexity, and privileges required but no user interaction needed. The scope is changed (S:C), indicating that the vulnerability can affect resources beyond the initially compromised component. No public exploits have been reported yet, but the presence of authenticated injection vectors makes it a significant risk for sites with multiple content contributors. The vulnerability was published on October 11, 2025, and affects all plugin versions up to and including 1.2. The lack of a patch link suggests a fix may not yet be available, emphasizing the need for interim mitigations.

For European organizations, this vulnerability poses a risk primarily to websites using the affected WordPress plugin, especially those with multiple contributors such as media companies, educational institutions, and public sector websites. Exploitation can lead to unauthorized script execution in users' browsers, resulting in session hijacking, data theft, defacement, or distribution of malware. This can damage organizational reputation, lead to regulatory non-compliance (e.g., GDPR violations if personal data is compromised), and cause operational disruptions. Since the attack requires contributor-level access, insider threats or compromised contributor accounts increase risk. The vulnerability's ability to affect all users visiting the infected pages broadens its impact. Given WordPress's popularity in Europe and the plugin's niche use for webcam embedding, the threat is moderate but significant for targeted sectors. The absence of known exploits reduces immediate risk but does not eliminate the potential for future attacks.

1. Monitor the plugin vendor's announcements closely and apply security patches immediately once released. 2. Until a patch is available, restrict contributor-level permissions to trusted users only and review existing contributor accounts for suspicious activity. 3. Implement strict input validation and output encoding at the application or web server level if possible, to neutralize malicious scripts. 4. Deploy a Web Application Firewall (WAF) with rules specifically designed to detect and block XSS payloads, especially targeting the 'webcam' shortcode parameters. 5. Conduct regular security audits and content reviews to detect injected scripts or unauthorized content changes. 6. Educate content contributors about phishing and credential security to reduce the risk of account compromise. 7. Consider temporarily disabling the vulnerable plugin or replacing it with alternative solutions if immediate patching is not feasible. 8. Enable Content Security Policy (CSP) headers to restrict script execution sources, mitigating impact if exploitation occurs.