CVE-2025-53330 is a Stored Cross-site Scripting (XSS) vulnerability identified in the WP Rentals plugin developed by WpEstate. This vulnerability arises from improper neutralization of input during web page generation, classified under CWE-79. Specifically, the plugin fails to adequately sanitize or encode user-supplied input before rendering it on web pages, allowing malicious scripts to be stored and executed in the context of users visiting affected pages. The vulnerability affects versions up to 3.13.1 of WP Rentals, with no earlier version specified. The CVSS 3.1 base score is 6.5 (medium severity), with vector AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L indicating that the attack can be performed remotely over the network with low attack complexity, requires low privileges but some user interaction, and impacts confidentiality, integrity, and availability to a limited extent. The scope is changed (S:C), meaning the vulnerability affects resources beyond the vulnerable component. Stored XSS can lead to session hijacking, defacement, phishing, or malware distribution by injecting malicious JavaScript that executes in the browsers of users who view the compromised content. The vulnerability requires an authenticated user with low privileges to inject the payload, and victim users must interact with the malicious content for exploitation. No known exploits are currently reported in the wild, and no patches have been linked yet. This vulnerability is critical to address in environments where WP Rentals is used, especially since it can compromise user trust and data integrity on websites relying on this plugin for rental property listings or management.

For European organizations using WP Rentals, particularly those in the real estate and property rental sectors, this vulnerability poses a significant risk. Exploitation could allow attackers to execute arbitrary scripts in the browsers of site visitors, potentially leading to theft of user credentials, session tokens, or other sensitive information. This can result in unauthorized access to user accounts, data breaches, and reputational damage. Given the plugin’s role in managing rental listings, attackers might also manipulate displayed information, causing misinformation or fraudulent listings. The medium CVSS score reflects moderate impact, but the scope change indicates that the vulnerability could affect multiple users and components beyond the plugin itself. European organizations are subject to strict data protection regulations such as GDPR, and a breach resulting from this vulnerability could lead to regulatory penalties and loss of customer trust. Additionally, the reliance on WP Rentals in countries with active real estate markets increases the potential attack surface. The absence of known exploits currently provides a window for mitigation before active exploitation occurs.

Organizations should immediately audit their WP Rentals plugin versions and upgrade to the latest version once a patch is released by WpEstate. Until a patch is available, administrators should implement strict input validation and output encoding on all user-generated content fields within the plugin, possibly via web application firewalls (WAFs) that can detect and block typical XSS payloads. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts on affected web pages. Limit user privileges to the minimum necessary to reduce the risk of malicious input submission. Conduct regular security reviews and penetration testing focused on plugin components handling user input. Monitor web server and application logs for suspicious activities indicative of attempted XSS exploitation. Educate users and administrators about the risks of interacting with untrusted content and the importance of prompt updates. Finally, maintain a robust backup and incident response plan to quickly recover from potential compromises.