CVE-2025-7885 is a cross-site scripting (XSS) vulnerability identified in Huashengdun WebSSH versions up to 1.6.2. The vulnerability resides in the login page component, specifically in the handling of the 'hostname' and 'port' parameters. Improper input validation or sanitization allows an attacker to inject malicious scripts into these parameters, which are then executed in the context of the victim's browser when the login page is accessed. This vulnerability is remotely exploitable without requiring authentication, and the attacker only needs to trick a user into visiting a crafted URL or interacting with a manipulated login page. The CVSS 4.0 base score is 5.3, indicating a medium severity level. The vector details show that the attack requires no privileges and no user authentication but does require user interaction (UI:P). The impact on confidentiality is none, integrity is low, and availability is none, as the primary risk is the execution of malicious scripts that could lead to session hijacking, credential theft, or other client-side attacks. The vendor was notified but did not respond, and no patches have been released yet. Although no known exploits are currently in the wild, the public disclosure of the exploit code increases the risk of exploitation.

For European organizations using Huashengdun WebSSH, this vulnerability poses a moderate risk primarily to the confidentiality and integrity of user sessions. Since WebSSH is a web-based SSH client, it is often used by IT administrators and security teams to manage remote servers. Successful exploitation could allow attackers to steal session cookies, credentials, or perform actions on behalf of the user, potentially leading to unauthorized access to critical infrastructure. This risk is heightened in sectors with high reliance on remote server management, such as finance, telecommunications, and government agencies. The lack of vendor response and absence of patches mean organizations must rely on mitigations until an official fix is available. The requirement for user interaction suggests that phishing or social engineering campaigns could be used to exploit this vulnerability, increasing the risk in environments where users are less security-aware. Additionally, the vulnerability could be leveraged as a foothold for more advanced attacks targeting European critical infrastructure or data centers.

Given the absence of official patches, European organizations should implement the following specific mitigations: 1) Employ strict input validation and output encoding on the login page parameters if possible by customizing or wrapping the WebSSH application, to neutralize malicious scripts in 'hostname' and 'port' inputs. 2) Use web application firewalls (WAFs) with rules specifically designed to detect and block XSS payloads targeting WebSSH login pages. 3) Restrict access to the WebSSH interface to trusted IP addresses or VPNs to reduce exposure to external attackers. 4) Educate users and administrators about the risks of phishing and social engineering attacks that could exploit this vulnerability. 5) Monitor web server and application logs for suspicious requests containing unusual or script-like content in the 'hostname' or 'port' parameters. 6) Consider deploying Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers accessing the WebSSH interface. 7) Plan for rapid patch deployment once the vendor releases an official fix, and track updates from security advisories related to Huashengdun WebSSH.