CVE-2025-34410 is a Cross-Site Request Forgery (CSRF) vulnerability identified in LXware's 1Panel product, specifically affecting versions 1.10.33 through 2.0.15. The vulnerability exists in the Change Username functionality accessible via the /settings/panel endpoint. This endpoint fails to implement standard CSRF protections such as anti-CSRF tokens or validation of the Origin or Referer HTTP headers. As a result, an attacker can create a malicious webpage that silently submits a request to change the username of an authenticated user. Because the victim's browser automatically includes valid session cookies, the request is processed successfully without the victim's consent. The immediate consequence is that the victim's username is changed, which forcibly logs them out and prevents login with the previous username, effectively locking the user out of their account and causing denial of service. The vulnerability does not require any prior authentication or elevated privileges, but it does require that the victim visit a malicious webpage, making user interaction necessary. The CVSS 4.0 vector (AV:N/AC:L/AT:N/UI:A/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N) reflects network attack vector, low attack complexity, no privileges required, user interaction required, no confidentiality impact, low integrity impact, high availability impact, and no scope or security requirement changes. No public exploits have been reported yet, but the vulnerability poses a significant risk to user account availability and service continuity.

For European organizations using LXware 1Panel, this vulnerability can lead to targeted denial of service against user accounts by malicious actors who trick authenticated users into visiting crafted malicious webpages. The primary impact is account lockout, which disrupts user access and can halt administrative or operational activities managed via 1Panel. This can degrade service availability and potentially impact business continuity, especially in environments relying on 1Panel for critical infrastructure or service management. While confidentiality is not directly compromised, the integrity of user account management is affected, and the forced logout can cause operational delays. Attackers could leverage this vulnerability to disrupt multiple users, amplifying the impact in large organizations. Given the ease of exploitation over the network and no need for authentication, the threat is significant. Organizations in sectors with high reliance on web-based control panels, such as hosting providers, managed service providers, or enterprises using LXware 1Panel for infrastructure management, are particularly at risk.

To mitigate CVE-2025-34410, organizations should immediately upgrade to a patched version of LXware 1Panel once available. In the absence of an official patch, implement compensating controls such as adding web application firewall (WAF) rules to detect and block suspicious POST requests to the /settings/panel endpoint that attempt to change usernames. Enforce strict Origin and Referer header validation at the web server or reverse proxy level to reject requests lacking legitimate headers. Implement Content Security Policy (CSP) and SameSite cookie attributes to reduce the risk of CSRF attacks. Educate users to avoid clicking on suspicious links or visiting untrusted websites while authenticated. Additionally, consider adding multi-factor authentication (MFA) to reduce the impact of account lockouts and improve overall account security. Regularly audit logs for unusual username change attempts and monitor for signs of exploitation. Finally, restrict access to the 1Panel interface to trusted networks or VPNs where feasible to limit exposure.