CVE-2025-56320 is a stored Cross-Site Scripting (XSS) vulnerability identified in the chat box component of Enterprise Contract Management Portal version 22.4.0. Stored XSS occurs when malicious input is saved by the application and later rendered in users' browsers without proper sanitization, enabling attackers to execute arbitrary JavaScript code. In this case, a remote attacker with limited privileges (PR:L) can inject malicious scripts into the chat box, which are then stored and executed when other users view the chat content. The vulnerability requires user interaction (UI:R), such as a user viewing the malicious chat message, and affects confidentiality and integrity (C:L/I:L) but not availability (A:N). The scope is changed (S:C), meaning the vulnerability can affect resources beyond the vulnerable component, potentially impacting the entire application session or user data. The CVSS vector (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N) indicates network attack vector, low attack complexity, and limited privileges required. No patches or known exploits are currently available, but the vulnerability poses a risk of session hijacking, credential theft, or unauthorized actions performed on behalf of the victim user. The CWE-79 classification confirms the nature of the vulnerability as improper neutralization of input during web page generation. This vulnerability is particularly concerning for enterprise environments where sensitive contract data and communications are handled via the portal's chat feature.

For European organizations, the impact of CVE-2025-56320 could be significant, especially in sectors relying heavily on contract management portals for sensitive negotiations and document exchanges. Exploitation could lead to unauthorized disclosure of confidential contract details, session hijacking, or manipulation of contract-related communications, undermining trust and potentially causing financial and reputational damage. The vulnerability could facilitate lateral movement within corporate networks if attackers leverage stolen session tokens or credentials. Given the medium severity and requirement for user interaction, the threat is more likely to be exploited in targeted phishing or social engineering campaigns. Organizations in regulated industries such as finance, legal, and government sectors may face compliance risks if sensitive data is compromised. The absence of patches increases exposure until mitigations are implemented.

To mitigate CVE-2025-56320, organizations should implement strict input validation and output encoding in the chat box component to prevent malicious script injection. Employing a whitelist approach for allowed characters and sanitizing all user-generated content before storage and rendering is critical. Applying Content Security Policy (CSP) headers can help restrict the execution of unauthorized scripts. Additionally, restricting chat functionality to authenticated and authorized users reduces exposure. Monitoring chat logs for suspicious content and educating users about the risks of interacting with untrusted chat messages can reduce successful exploitation. Until an official patch is released, consider disabling or limiting the chat feature if feasible. Regularly update and audit web application firewalls (WAFs) to detect and block XSS payloads targeting this vulnerability. Finally, maintain an incident response plan to quickly address any exploitation attempts.