CVE-2025-65621 is a stored cross-site scripting (XSS) vulnerability identified in the Snipe-IT asset management software, affecting all versions prior to 8.3.4. The vulnerability arises because the application fails to properly sanitize or encode user-supplied input that is stored and later rendered in the administrator's interface. A low-privileged authenticated user can exploit this by injecting malicious JavaScript code into fields or inputs that are later viewed by an administrator. When the administrator accesses the affected page, the injected script executes in their browser context, potentially allowing the attacker to hijack the administrator's session, steal credentials, or perform actions with elevated privileges. This effectively enables privilege escalation from a low-privileged user to an administrator. The vulnerability requires authentication and user interaction (the admin must view the malicious content), and it impacts confidentiality and integrity but does not affect system availability. The CVSS 3.1 base score is 5.4, reflecting a medium severity level due to the ease of exploitation within an authenticated context and the potential impact on sensitive administrative functions. No public exploits have been reported yet, but the vulnerability is publicly disclosed and should be addressed promptly. The CWE classification CWE-269 indicates improper privilege management, consistent with the privilege escalation vector.

For European organizations using Snipe-IT for IT asset management, this vulnerability poses a significant risk of unauthorized privilege escalation. An attacker with low-level access could leverage this flaw to compromise administrator accounts, leading to unauthorized access to sensitive asset data, configuration changes, or further lateral movement within the network. This could result in data breaches, loss of asset control, and potential disruption of IT operations. Given that asset management systems often contain critical inventory and licensing information, compromise could also affect compliance and auditing processes. The medium severity score suggests moderate urgency, but the potential for privilege escalation elevates the risk profile. Organizations with multiple users and administrators interacting with Snipe-IT are particularly at risk, as the attack requires an administrator to view the malicious input. The impact on confidentiality and integrity is notable, especially in regulated sectors common in Europe such as finance, healthcare, and government.

European organizations should immediately upgrade Snipe-IT to version 8.3.4 or later, where this vulnerability is fixed. If immediate patching is not possible, implement strict input validation and output encoding on all user-supplied data fields within Snipe-IT to prevent script injection. Restrict low-privileged user permissions to the minimum necessary to reduce the attack surface. Educate administrators to be cautious when viewing user-generated content and consider temporarily limiting administrator access to the affected modules until patched. Employ Content Security Policy (CSP) headers to restrict the execution of unauthorized scripts in the browser. Monitor logs for unusual activity indicative of attempted XSS exploitation or privilege escalation. Additionally, conduct regular security audits and penetration testing focused on web application vulnerabilities in asset management tools. Finally, ensure multi-factor authentication (MFA) is enabled for administrator accounts to mitigate session hijacking risks.