CVE-2025-67556 identifies a stored cross-site scripting (XSS) vulnerability in the ThemeHigh Advanced FAQ Manager plugin for WordPress, affecting versions up to 1.5.2. Stored XSS occurs when malicious input is improperly sanitized and then stored by the application, later rendered in web pages viewed by other users. In this case, the vulnerability stems from improper neutralization of input during web page generation, allowing attackers to inject arbitrary JavaScript code into FAQ content or related fields. When other users access the compromised FAQ pages, the malicious script executes in their browsers within the context of the vulnerable site. This can lead to session hijacking, credential theft, unauthorized actions on behalf of users, or distribution of malware. The vulnerability does not require authentication or user interaction beyond visiting the affected page, increasing its risk profile. No CVSS score has been assigned yet, and no public exploits are known at this time. The plugin is widely used in WordPress environments to manage FAQ content, making it a relevant target for attackers seeking to compromise websites and their users. The lack of a patch link suggests that a fix may not yet be publicly available, emphasizing the need for vigilance and interim protective measures.

For European organizations, the impact of this stored XSS vulnerability can be significant. Many businesses rely on WordPress and plugins like Advanced FAQ Manager to provide customer support and information. Exploitation could lead to unauthorized access to user sessions, theft of sensitive information such as login credentials, and potential defacement or manipulation of website content. This undermines user trust and can cause reputational damage. Additionally, attackers could leverage the vulnerability to distribute malware or conduct phishing attacks targeting European users. Organizations in sectors with strict data protection regulations, such as finance, healthcare, and e-commerce, face heightened risks of regulatory penalties if user data is compromised. The vulnerability could also be used as a foothold for further network intrusion. Given the ease of exploitation and the public-facing nature of FAQ pages, the threat is particularly relevant for organizations with high web traffic and customer interaction.

1. Monitor ThemeHigh’s official channels for a security patch and apply updates immediately once available. 2. Until a patch is released, restrict or disable the Advanced FAQ Manager plugin if feasible, especially on high-risk or sensitive websites. 3. Implement strict input validation and output encoding on all user-supplied content fields within the FAQ manager to neutralize malicious scripts. 4. Deploy a Web Application Firewall (WAF) configured to detect and block common XSS payloads targeting the plugin’s endpoints. 5. Conduct regular security audits and penetration testing focusing on web application input handling. 6. Educate website administrators and content managers about the risks of injecting untrusted content and encourage cautious content management practices. 7. Use Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers. 8. Monitor web server and application logs for unusual activity that might indicate exploitation attempts.