CVE-2025-63050 is a Stored Cross-Site Scripting (XSS) vulnerability identified in the sizam REHub Framework, a popular WordPress theme and plugin suite used primarily for affiliate marketing, price comparison, and e-commerce websites. The vulnerability stems from improper neutralization of user-supplied input during the dynamic generation of web pages, allowing malicious scripts to be stored persistently on the server and served to other users. When a victim visits a compromised page, the injected script executes in their browser context, potentially leading to session hijacking, credential theft, unauthorized actions, or malware distribution. The affected versions include all releases up to and including 19.9.8. No CVSS score has been assigned yet, and no public exploits have been reported, but the vulnerability is publicly disclosed and classified as published. Exploitation requires no authentication and no user interaction beyond visiting the infected page, increasing the attack surface. The lack of patches currently available necessitates immediate attention to input validation and output encoding practices. The REHub Framework’s widespread use in European e-commerce and affiliate marketing sectors increases the risk profile for organizations in these industries. The vulnerability’s technical nature involves failure to sanitize or encode input fields properly before rendering them in HTML output, a common vector for stored XSS attacks.

For European organizations, especially those operating e-commerce, affiliate marketing, or price comparison websites using the REHub Framework, this vulnerability poses significant risks. Attackers could exploit the stored XSS to hijack user sessions, steal sensitive customer data such as login credentials and payment information, or perform unauthorized actions on behalf of users, undermining trust and potentially leading to financial losses and reputational damage. The persistent nature of stored XSS means that once injected, malicious scripts can affect all visitors to the compromised pages, amplifying the impact. Regulatory implications under GDPR are also a concern, as data breaches involving personal information could lead to substantial fines. Additionally, attackers might use the vulnerability as a foothold to pivot into internal networks or distribute malware, increasing the scope of damage. The ease of exploitation without authentication or complex prerequisites further elevates the threat level for European businesses relying on this framework.

Organizations should prioritize the following specific mitigation steps: 1) Monitor official sizam and REHub Framework channels for security patches and apply them immediately upon release; 2) Until patches are available, implement strict input validation on all user-supplied data, ensuring that potentially dangerous characters are sanitized or rejected; 3) Employ robust output encoding techniques when rendering user input in HTML contexts to prevent script execution; 4) Deploy Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of any injected code; 5) Conduct thorough security audits and penetration testing focusing on XSS vulnerabilities within the REHub Framework implementation; 6) Educate developers and administrators on secure coding practices related to input handling; 7) Use Web Application Firewalls (WAFs) with updated rules to detect and block XSS attack patterns targeting this framework; 8) Regularly review and monitor website logs for suspicious activities indicative of exploitation attempts.