CVE-2026-1049 is a cross-site scripting vulnerability identified in the LigeroSmart application, specifically affecting all versions up to 6.1.26. The vulnerability is located in the /otrs/index.pl script, where the TicketID parameter is not properly sanitized or encoded before being reflected in the web page output. This flaw allows an attacker to craft a malicious URL containing executable JavaScript code within the TicketID argument. When a legitimate user accesses this URL, the injected script executes in their browser context, potentially leading to session hijacking, credential theft, or unauthorized actions performed on behalf of the user. The attack vector is remote and does not require prior authentication, although user interaction (clicking the malicious link) is necessary. The vulnerability was responsibly disclosed to the LigeroSmart project, but as of the publication date, no patch or official fix has been released. The CVSS 4.0 vector indicates network attack vector (AV:N), low attack complexity (AC:L), no privileges required (PR:L), user interaction required (UI:P), and limited impact on confidentiality and integrity (VC:N, VI:L), with no impact on availability. No known exploits are currently observed in the wild, but public disclosure increases the risk of exploitation attempts. The lack of vendor response and patch availability heightens the urgency for organizations to implement compensating controls.

For European organizations, this vulnerability poses a moderate risk primarily to confidentiality and integrity of user sessions and data handled via LigeroSmart ticketing systems. Successful exploitation could allow attackers to steal session cookies, impersonate users, or perform unauthorized actions within the application, potentially leading to data leakage or manipulation of support tickets. This could disrupt customer service operations and damage organizational reputation. Given the remote exploitability and no requirement for authentication, attackers could target employees or customers via phishing campaigns embedding malicious TicketID URLs. The impact is particularly significant for sectors relying heavily on ticketing platforms for incident management, such as government agencies, financial institutions, and critical infrastructure operators. However, the absence of availability impact and the need for user interaction somewhat limit the overall severity. Organizations without adequate input validation or web security controls are at higher risk.

To mitigate CVE-2026-1049, organizations should first verify if they are running affected LigeroSmart versions (6.1.0 through 6.1.26) and plan for an upgrade once a vendor patch is available. In the interim, implement strict input validation and output encoding on the TicketID parameter to neutralize malicious scripts. Deploy and configure web application firewalls (WAFs) with rules specifically targeting XSS attack patterns, including those exploiting URL parameters. Educate users and staff to recognize and avoid clicking suspicious links, especially those containing unusual TicketID values. Monitor web server logs and application behavior for anomalous requests or error patterns indicative of attempted XSS exploitation. Consider isolating or restricting access to the LigeroSmart interface to trusted networks or VPNs to reduce exposure. If possible, implement Content Security Policy (CSP) headers to limit the execution of unauthorized scripts in browsers. Finally, maintain regular backups and incident response plans to quickly recover from any successful attacks.