CVE-2025-30955 is a high-severity reflected Cross-site Scripting (XSS) vulnerability affecting the GT3themes ListingEasy product, versions up to 1.9.2. This vulnerability arises from improper neutralization of user-supplied input during web page generation, classified under CWE-79. Specifically, ListingEasy fails to adequately sanitize or encode input parameters that are reflected back in HTTP responses, allowing an attacker to inject malicious scripts. When a victim user interacts with a crafted URL containing malicious payloads, the injected script executes in the context of the victim's browser. This can lead to session hijacking, credential theft, defacement, or redirection to malicious sites. The CVSS 3.1 score of 7.1 reflects a network attack vector with low attack complexity, no privileges required, but requiring user interaction, and impacting confidentiality, integrity, and availability with a scope change. No known exploits are currently reported in the wild, and no official patches have been linked yet. The vulnerability was reserved in March 2025 and published in July 2025, indicating recent discovery. Given ListingEasy is a WordPress theme/plugin product by GT3themes, it is likely used by websites for listing or directory services, which may be customer-facing and handle user-generated content, increasing the risk surface for exploitation.

For European organizations, the impact of this reflected XSS vulnerability can be significant, especially for businesses relying on ListingEasy for their web presence, such as real estate agencies, local business directories, or service marketplaces. Exploitation could lead to theft of user credentials or session tokens, enabling attackers to impersonate legitimate users or administrators. This can result in unauthorized access to sensitive data, defacement of websites, or distribution of malware to visitors, damaging brand reputation and customer trust. Additionally, compromised sites may be blacklisted by search engines or browsers, causing loss of traffic and revenue. Given the GDPR framework, data breaches resulting from such attacks could lead to regulatory fines and legal consequences. The reflected nature of the XSS requires user interaction, but phishing campaigns leveraging this vulnerability could be effective. The scope change in CVSS indicates that exploitation could affect resources beyond the vulnerable component, amplifying the impact.

European organizations using GT3themes ListingEasy should immediately audit their websites for the presence of this plugin and confirm the version in use. Although no official patch links are currently available, organizations should monitor GT3themes and trusted vulnerability databases for updates or patches addressing CVE-2025-30955. In the interim, applying Web Application Firewall (WAF) rules to detect and block typical reflected XSS payloads targeting ListingEasy endpoints can reduce risk. Developers or site administrators should implement strict input validation and output encoding on all user-supplied data reflected in web pages, following OWASP guidelines. Employing Content Security Policy (CSP) headers can mitigate the impact of successful XSS by restricting script execution sources. Regular security scanning and penetration testing focused on XSS vectors are recommended. User awareness training to recognize suspicious links can reduce successful exploitation via phishing. Finally, maintaining up-to-date backups and incident response plans will help mitigate damage if exploitation occurs.