CVE-2025-58602 is a vulnerability classified under CWE-79, indicating an Improper Neutralization of Input During Web Page Generation, commonly known as Cross-site Scripting (XSS). This specific vulnerability affects the IfSo Dynamic Content Personalization plugin, versions up to 1.9.4. The flaw allows an attacker to inject malicious scripts that are stored persistently (Stored XSS) within the web application. When other users or administrators access the affected pages, the malicious script executes in their browsers. The vulnerability arises due to insufficient sanitization or encoding of user-supplied input before it is embedded into dynamically generated web pages. According to the CVSS 3.1 vector (AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:L), the attack can be launched remotely over the network with low attack complexity, requires some level of privileges (PR:L) and user interaction (UI:R), and affects confidentiality, integrity, and availability to a limited extent. The scope is changed (S:C), meaning the vulnerability can impact resources beyond the initially vulnerable component. No known exploits are currently in the wild, and no patches have been linked yet. Stored XSS vulnerabilities are particularly dangerous because they can be used for session hijacking, defacement, phishing, or delivering malware, potentially compromising user accounts and sensitive data.

For European organizations using the IfSo Dynamic Content Personalization plugin, this vulnerability poses a significant risk to web application security and user trust. Exploitation could lead to unauthorized access to user sessions, theft of sensitive information, and manipulation of web content. This is especially critical for organizations handling personal data under GDPR, as exploitation could result in data breaches and regulatory penalties. The vulnerability's ability to affect confidentiality, integrity, and availability means that attackers could alter displayed content, inject malicious payloads, or disrupt service availability. Given the plugin's use in content personalization, attacks could be targeted to specific user groups, increasing the risk of spear-phishing or fraud. The requirement for some privileges and user interaction means that internal users or authenticated customers could be vectors for exploitation, raising concerns for internal threat scenarios and insider risks. The scope change indicates that exploitation could affect other components or data beyond the plugin itself, potentially impacting broader systems or integrated services.

1. Immediate mitigation should include restricting privileges to only trusted users who can input or manage dynamic content within the IfSo plugin to reduce the attack surface. 2. Implement strict input validation and output encoding on all user-supplied data fields within the plugin, ensuring that any HTML or script tags are properly sanitized or escaped before rendering. 3. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in browsers, limiting the impact of any injected code. 4. Monitor web application logs for unusual input patterns or repeated attempts to inject scripts, enabling early detection of exploitation attempts. 5. Until an official patch is released, consider disabling or limiting the use of the IfSo Dynamic Content Personalization plugin on critical systems or public-facing websites. 6. Educate users and administrators about the risks of clicking on suspicious links or interacting with untrusted content, as user interaction is required for exploitation. 7. Regularly update and audit all plugins and dependencies to ensure timely application of security patches once available. 8. Conduct security testing, including automated scanning and manual penetration testing, focusing on input handling and output encoding in the affected plugin.