CVE-2025-57462 is a stored cross-site scripting (XSS) vulnerability identified in MachSol MachPanel version 8.0.32, a web-based control panel used for cloud and hosting management. The vulnerability arises from improper sanitization of input data embedded within PDF files uploaded to the platform. An attacker can craft a malicious PDF containing embedded scripts or HTML that, when processed and stored by MachPanel, results in the execution of arbitrary web scripts in the context of the victim's browser upon viewing or interacting with the affected interface. This stored XSS can lead to session hijacking, credential theft, or unauthorized actions performed on behalf of the victim user. The vulnerability does not require any privileges to exploit but does require user interaction, such as an administrator or user opening or processing the malicious PDF within the MachPanel environment. The CVSS 3.1 base score of 6.1 reflects a medium severity level, with an attack vector of network (remote), low attack complexity, no privileges required, but user interaction necessary. The scope is changed, indicating that the vulnerability affects components beyond the initially vulnerable component, potentially impacting the broader application or user session. No patches or fixes have been published at the time of disclosure, and no known exploits have been reported in the wild. The CWE classification is CWE-79, which corresponds to cross-site scripting vulnerabilities. This vulnerability underscores the risks associated with insufficient input validation and the dangers of processing complex file types like PDFs without proper sanitization in web management platforms.

For European organizations, especially those using MachSol MachPanel for cloud infrastructure or hosting management, this vulnerability poses a moderate risk. Exploitation could lead to unauthorized access to sensitive information, session hijacking, or manipulation of user actions within the platform, potentially compromising the confidentiality and integrity of organizational data. Given the nature of MachPanel as a management interface, successful exploitation could disrupt administrative workflows or lead to further compromise of hosted services. The requirement for user interaction limits the ease of exploitation but does not eliminate risk, particularly in environments where multiple users or administrators interact with uploaded files. The lack of available patches increases exposure time, and organizations may face compliance risks under GDPR if personal data is compromised. Additionally, attackers could leverage this vulnerability as a foothold for more extensive attacks within cloud or hosting environments, impacting service availability indirectly.

European organizations should implement immediate mitigations to reduce risk from CVE-2025-57462. These include disabling or restricting PDF file uploads within MachPanel where possible, or implementing strict file validation and sanitization processes before accepting uploads. Employ web application firewalls (WAFs) with rules targeting XSS payloads and monitor logs for suspicious upload or script execution activity. Educate users and administrators about the risks of interacting with untrusted files and enforce least privilege principles to limit the impact of potential exploitation. Regularly audit and review MachPanel configurations and user permissions. Until an official patch is released, consider isolating MachPanel instances from direct internet exposure or using network segmentation to limit access. Engage with MachSol support or vendors for updates and apply patches promptly once available. Additionally, implement Content Security Policy (CSP) headers to restrict script execution contexts and reduce XSS impact.