CVE-2026-2546 is a cross-site scripting (XSS) vulnerability identified in LigeroSmart, a service management and ticketing software, affecting all versions up to 6.1.26. The vulnerability is located in the /otrs/index.pl script, specifically involving the SortBy parameter, which is improperly sanitized before being reflected in the web interface. This flaw allows an attacker to craft a malicious URL containing executable JavaScript code that, when visited by an authenticated or unauthenticated user, executes in the victim’s browser context. The vulnerability is remotely exploitable without requiring authentication, though user interaction is necessary to trigger the attack. The CVSS 4.0 vector indicates network attack vector, low attack complexity, no privileges required, but user interaction is needed. The impact primarily affects data integrity by enabling script injection and potentially session hijacking or phishing attacks, with limited impact on confidentiality and availability. The LigeroSmart project was notified early but has not issued a patch or mitigation guidance, and no known exploits are currently observed in the wild. This leaves organizations using LigeroSmart exposed to potential targeted attacks leveraging this vulnerability. The lack of official remediation increases the urgency for organizations to implement compensating controls.

For European organizations, the exploitation of this XSS vulnerability could lead to unauthorized script execution in users’ browsers, enabling attackers to steal session cookies, perform actions on behalf of users, or conduct phishing attacks by injecting malicious content. This can compromise the integrity of service management workflows and potentially expose sensitive operational data. Organizations relying on LigeroSmart for IT service management, customer support, or internal ticketing systems may face disruptions or data manipulation risks. The vulnerability’s remote exploitability and lack of authentication requirements increase the attack surface, especially in environments where users access the application via browsers. Although the confidentiality impact is limited, the potential for session hijacking and social engineering attacks could indirectly lead to broader breaches. The absence of an official patch means European entities must rely on interim mitigations, increasing operational risk. Critical sectors such as finance, healthcare, and government using LigeroSmart may be particularly vulnerable to targeted exploitation attempts.

Since no official patch is currently available, European organizations should implement immediate compensating controls. First, apply strict input validation and output encoding on the SortBy parameter at the web server or application proxy level to neutralize malicious scripts. Deploy web application firewalls (WAFs) with custom rules to detect and block XSS payloads targeting the SortBy parameter. Educate users to avoid clicking on suspicious links and implement browser security features such as Content Security Policy (CSP) headers to restrict script execution origins. Monitor web server logs for unusual requests containing suspicious SortBy parameter values. If feasible, isolate the LigeroSmart application behind a VPN or restrict access to trusted IP ranges to reduce exposure. Regularly review and update incident response plans to include XSS attack scenarios. Finally, maintain communication with the LigeroSmart vendor or community for updates on patches or official mitigations and plan for prompt application once available.