CVE-2025-64202 is a DOM-based Cross-site Scripting (XSS) vulnerability identified in the TieLabs Sahifa WordPress theme, affecting versions prior to 5.8.6. The vulnerability stems from improper neutralization of user-supplied input during the generation of web pages, which allows malicious actors to inject and execute arbitrary JavaScript code within the context of a victim’s browser session. This type of XSS is client-side and occurs when the web application uses unsafe JavaScript methods to process input data without proper sanitization or encoding. The vulnerability requires an attacker to have low privileges (PR:L) and involves user interaction (UI:R), such as tricking a user into clicking a crafted link or visiting a malicious page. The CVSS vector indicates network attack vector (AV:N), low attack complexity (AC:L), and a scope change (S:C), meaning the vulnerability can affect resources beyond the initially vulnerable component. The impact includes partial loss of confidentiality, integrity, and availability (C:L/I:L/A:L), potentially allowing session hijacking, defacement, or redirection to malicious sites. No known exploits have been reported in the wild yet, but the widespread use of Sahifa in WordPress sites makes this a significant concern. The vulnerability was published on October 29, 2025, and no official patches or fixes were linked at the time of reporting, emphasizing the need for proactive mitigation. The issue is categorized as medium severity, reflecting the balance between exploitability and impact. TieLabs Sahifa is a popular theme used by many organizations for content management and publishing, making this vulnerability relevant for web-facing assets.

For European organizations, the impact of CVE-2025-64202 can be significant, especially for those relying on the Sahifa theme for their WordPress-based websites. Successful exploitation could lead to unauthorized script execution in users’ browsers, enabling session hijacking, theft of sensitive information, defacement of web content, or redirection to malicious sites. This can damage organizational reputation, lead to data breaches involving customer or employee data, and potentially disrupt business operations. Given the medium severity, the vulnerability does not allow full system compromise but can facilitate further attacks or social engineering campaigns. Organizations in sectors such as media, e-commerce, education, and government that maintain public-facing websites with Sahifa are particularly at risk. The cross-site scripting nature also poses risks to end users, potentially exposing them to phishing or malware delivery. The lack of known exploits in the wild currently reduces immediate risk but does not eliminate the threat, especially as attackers often develop exploits after public disclosure. The scope change in the CVSS vector indicates that the vulnerability could affect components beyond the initial vulnerable module, increasing potential impact. Overall, European organizations must consider this vulnerability in their web security posture to prevent exploitation and maintain trust.

1. Apply official patches or updates from TieLabs as soon as they become available to address the vulnerability in Sahifa versions prior to 5.8.6. 2. If patches are not yet available, implement temporary mitigations such as disabling or restricting vulnerable features or scripts within the Sahifa theme that handle user input. 3. Employ strict input validation and output encoding on all user-supplied data processed by the web application to prevent injection of malicious scripts. 4. Implement Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts and reduce the impact of potential XSS attacks. 5. Conduct regular security audits and penetration testing focused on client-side vulnerabilities, including DOM-based XSS. 6. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content. 7. Monitor web traffic and logs for unusual activity that may indicate attempted exploitation. 8. Consider using Web Application Firewalls (WAF) with rules tuned to detect and block XSS payloads targeting Sahifa. 9. Maintain a robust incident response plan to quickly address any exploitation attempts. 10. Keep all WordPress plugins, themes, and core software up to date to minimize exposure to known vulnerabilities.