CVE-2025-40992 is a stored Cross-Site Scripting (XSS) vulnerability identified in the Creativeitem Sociopro product, affecting all versions. The vulnerability arises from improper neutralization of user input in the 'name' parameter submitted via a POST request to the '/sociopro/profile/update_profile' endpoint. Because the input is not properly validated or sanitized, an attacker can inject malicious scripts that are stored on the server and later executed in the context of authenticated users who view the affected profile page. This type of stored XSS can lead to session hijacking by stealing cookie session details, enabling attackers to impersonate legitimate users. The vulnerability requires the attacker to have some level of access to submit the crafted payload (PR:L - privileges required: low), but does not require user interaction beyond the victim viewing the malicious content (UI:P). The CVSS 4.0 score is 5.1 (medium severity), reflecting network attack vector, low attack complexity, no privileges required for exploitation beyond low privileges, and partial impact on integrity and availability but no impact on confidentiality. No known exploits are reported in the wild yet. The vulnerability is classified under CWE-79, which covers improper neutralization of input during web page generation, a common vector for XSS attacks. The lack of a patch link indicates that a fix may not yet be publicly available, increasing the urgency for mitigation.

For European organizations using Creativeitem Sociopro, this vulnerability poses a significant risk to user session security and data integrity. Attackers exploiting this flaw can hijack authenticated user sessions, potentially gaining unauthorized access to sensitive personal or organizational information. This could lead to data breaches, unauthorized actions performed on behalf of users, and reputational damage. Since Sociopro is likely used for social or professional networking purposes, the exposure of session cookies could facilitate lateral movement within an organization or enable phishing campaigns leveraging compromised accounts. The medium severity rating suggests moderate impact, but the stored nature of the XSS increases risk because malicious scripts persist and affect multiple users over time. European organizations with strict data protection regulations such as GDPR must be particularly cautious, as exploitation could lead to regulatory penalties if personal data is compromised. Additionally, the vulnerability could be leveraged in targeted attacks against high-value users within organizations, amplifying the potential damage.

To mitigate this vulnerability, organizations should implement strict input validation and output encoding on the 'name' parameter at the '/sociopro/profile/update_profile' endpoint. Specifically, all user-supplied input should be sanitized to remove or encode HTML special characters before storage and display. Employing Content Security Policy (CSP) headers can help reduce the impact of XSS by restricting the execution of unauthorized scripts. Organizations should monitor and restrict user privileges to minimize the ability of low-privilege users to inject malicious content. Until an official patch is released, consider implementing Web Application Firewall (WAF) rules to detect and block suspicious payloads targeting this endpoint. Regular security audits and penetration testing focused on input validation can help identify similar vulnerabilities. Additionally, educating users about the risks of clicking on suspicious links and monitoring for unusual session activity can help detect exploitation attempts early.