CVE-2025-10190 is a stored Cross-Site Scripting (XSS) vulnerability identified in the WP Easy Toggles plugin for WordPress, affecting all versions up to and including 1.9.0. The root cause is insufficient input sanitization and output escaping on user-supplied attributes within the plugin's 'toggles' shortcode. This flaw allows authenticated attackers with contributor-level access or higher to inject arbitrary JavaScript code into pages. Because the malicious script is stored, it executes every time a user accesses the compromised page, potentially leading to session hijacking, privilege escalation, or unauthorized actions within the WordPress site. The vulnerability requires authentication but no user interaction beyond viewing the page. The CVSS v3.1 score is 6.4 (medium severity), reflecting the network attack vector, low attack complexity, and partial impact on confidentiality and integrity but no impact on availability. No patches or known exploits are currently reported, but the vulnerability is publicly disclosed and should be addressed promptly. The vulnerability is categorized under CWE-79, emphasizing improper neutralization of input during web page generation. The plugin's widespread use in WordPress sites makes this a relevant threat vector for website administrators and security teams.

For European organizations, this vulnerability poses a risk primarily to WordPress-based websites using the WP Easy Toggles plugin. Exploitation can lead to unauthorized script execution, enabling attackers to hijack user sessions, steal sensitive data, or perform actions with the privileges of the victim user. This can compromise website integrity and user trust, potentially leading to reputational damage and regulatory consequences under GDPR if personal data is exposed. Since contributor-level access is sufficient for exploitation, insider threats or compromised contributor accounts increase risk. The vulnerability does not affect availability but impacts confidentiality and integrity. Organizations relying on WordPress for customer-facing or internal portals are at risk, especially those with multiple contributors or less stringent access controls. The lack of known exploits reduces immediate risk but does not eliminate the threat, as attackers may develop exploits following disclosure.

1. Immediately update the WP Easy Toggles plugin to a patched version once available. 2. Until a patch is released, restrict contributor-level access and review user permissions to limit who can add or edit content using the 'toggles' shortcode. 3. Implement a Web Application Firewall (WAF) with rules to detect and block XSS payloads targeting the vulnerable shortcode. 4. Conduct regular security audits and monitor logs for suspicious activity related to shortcode usage or unexpected script injections. 5. Educate content contributors about safe content practices and the risks of injecting untrusted input. 6. Consider disabling or removing the WP Easy Toggles plugin if it is not essential. 7. Employ Content Security Policy (CSP) headers to reduce the impact of potential XSS attacks by restricting script execution sources. 8. Use security plugins that can detect and sanitize malicious content in WordPress posts and shortcodes.