CVE-2025-63048 is a DOM-based Cross-site Scripting (XSS) vulnerability identified in the ListingPro Lead Form plugin by CridioStudio, affecting versions up to 1.0.2. This vulnerability stems from improper neutralization of user-supplied input during web page generation, specifically within the lead form component, which fails to sanitize or encode input before reflecting it in the Document Object Model (DOM). As a result, an attacker can craft malicious payloads that execute arbitrary JavaScript in the context of the victim's browser when they interact with the vulnerable form or URL parameters. This type of XSS is client-side and does not require server-side code injection, making it particularly stealthy and difficult to detect. Exploitation can lead to theft of session cookies, redirection to malicious sites, or execution of unauthorized actions on behalf of the user. The vulnerability affects websites using the ListingPro Lead Form plugin, commonly deployed on WordPress platforms for lead generation purposes. No official patches or fixes are currently published, and no known exploits have been reported in the wild. The vulnerability was reserved in late October 2025 and published in December 2025, indicating recent discovery. The absence of a CVSS score necessitates an independent severity assessment based on impact and exploitability factors.

For European organizations, this vulnerability poses significant risks, especially for businesses relying on online lead generation forms integrated via the ListingPro plugin. Successful exploitation could compromise user data confidentiality through session hijacking or credential theft, undermine data integrity by enabling unauthorized actions, and damage organizational reputation. Attackers could leverage the vulnerability to distribute malware or conduct phishing campaigns by injecting malicious scripts. The impact is heightened for sectors with sensitive customer data or regulatory compliance requirements such as GDPR. Additionally, compromised websites could be blacklisted by search engines, affecting business continuity and customer trust. Since the vulnerability is client-side and does not require authentication, the attack surface is broad, potentially affecting any visitor to the vulnerable site. This can lead to widespread impact if exploited at scale. The lack of known exploits currently provides a window for proactive mitigation, but the risk remains high due to the common use of WordPress plugins in Europe.

1. Monitor CridioStudio and ListingPro plugin official channels for patches and apply them immediately upon release. 2. Implement strict input validation and output encoding on all user-supplied data within the lead form to prevent malicious script injection. 3. Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 4. Conduct regular security audits and penetration testing focusing on client-side vulnerabilities, especially DOM-based XSS. 5. Educate web developers and administrators on secure coding practices related to DOM manipulation and input handling. 6. Consider using Web Application Firewalls (WAFs) with rules tailored to detect and block XSS payloads targeting the ListingPro Lead Form. 7. Encourage users to keep browsers and security software up to date to mitigate exploitation risks on the client side. 8. Review and limit the exposure of sensitive data within the lead form and associated scripts to minimize potential damage from exploitation.