CVE-2025-63050 is a stored Cross-site Scripting (XSS) vulnerability identified in the sizam REHub Framework, a popular WordPress-based affiliate marketing and e-commerce theme framework. The vulnerability stems from improper neutralization of input during web page generation, which allows malicious actors to inject and store executable scripts within the application. When other users access the affected pages, these scripts execute in their browsers, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim. The vulnerability affects all versions up to and including 19.9.8. The CVSS v3.1 score of 6.5 reflects a medium severity, with an attack vector of network (remote exploitation), low attack complexity, requiring privileges (PR:L) and user interaction (UI:R). The scope is changed (S:C), indicating that the vulnerability can affect resources beyond the initially vulnerable component. The impact affects confidentiality, integrity, and availability, though to a limited extent (C:L, I:L, A:L). No public exploits have been reported yet, but the stored nature of the XSS increases the risk of widespread impact once exploited. The vulnerability was reserved in late October 2025 and published in December 2025, with no official patches currently linked, suggesting organizations must implement interim mitigations. The REHub Framework is widely used in e-commerce and affiliate marketing websites, which often handle user data and transactions, increasing the risk profile of this vulnerability.

For European organizations, this vulnerability poses a significant risk especially for businesses relying on the REHub Framework for e-commerce or affiliate marketing platforms. Exploitation could lead to theft of user credentials, session hijacking, defacement, or injection of malicious content that damages brand reputation and customer trust. Confidentiality breaches could expose personal data protected under GDPR, leading to regulatory penalties and legal consequences. Integrity impacts could result in unauthorized transactions or manipulation of displayed content, while availability impacts might arise from denial-of-service conditions triggered by malicious scripts. The requirement for user interaction and privileges limits the ease of exploitation but does not eliminate risk, particularly for organizations with many users or administrators with limited security awareness. The stored nature of the XSS means that once injected, the malicious payload can affect multiple users over time, amplifying potential damage. Given the widespread use of WordPress and related frameworks in Europe, the threat could affect a broad range of sectors including retail, travel, and digital services.

1. Monitor sizam’s official channels for patches and apply them promptly once available. 2. Implement strict input validation and output encoding on all user-supplied data to prevent malicious script injection. 3. Deploy a robust Content Security Policy (CSP) to restrict execution of unauthorized scripts and reduce XSS impact. 4. Limit user privileges to the minimum necessary, especially for content submission or administrative roles, to reduce the risk of privilege abuse. 5. Conduct regular security audits and penetration testing focusing on input handling and stored content vulnerabilities. 6. Educate users and administrators about the risks of XSS and the importance of cautious interaction with untrusted content. 7. Use Web Application Firewalls (WAFs) with rules designed to detect and block XSS payloads targeting the REHub Framework. 8. Consider isolating or sandboxing user-generated content areas to minimize script execution scope. 9. Maintain up-to-date backups to enable quick recovery if exploitation occurs. 10. Monitor logs and user activity for signs of exploitation attempts or unusual behavior.