CVE-2026-1048 is a cross-site scripting (XSS) vulnerability identified in LigeroSmart, a web-based ticketing and customer support system, affecting all versions up to 6.1.26. The vulnerability resides in the /otrs/index.pl script, specifically in the AgentTicketZoom action, where the TicketID parameter is not properly sanitized or encoded before being reflected in the web page. This allows an attacker to craft a malicious URL containing JavaScript payloads that execute in the context of the victim's browser when the URL is accessed. The attack vector is remote and does not require prior authentication, though it requires user interaction, such as an agent clicking or viewing the malicious link. The CVSS 4.0 score of 5.1 reflects a medium severity, considering the ease of exploitation (low complexity), no privileges required, but user interaction is necessary. The impact primarily affects confidentiality and integrity by potentially allowing session hijacking, theft of sensitive information, or unauthorized actions performed under the victim’s credentials. The vendor was notified early but has not yet issued a patch or official response. Public proof-of-concept exploits are available, increasing the risk of exploitation. The vulnerability is significant for organizations relying on LigeroSmart for internal or customer-facing ticket management, as it could compromise user accounts and data integrity.

For European organizations, the impact of CVE-2026-1048 could be substantial, especially for those using LigeroSmart in customer support, IT service management, or internal ticketing workflows. Successful exploitation could lead to session hijacking of support agents, enabling attackers to access sensitive customer data, manipulate tickets, or escalate privileges within the system. This could result in data breaches, loss of customer trust, and regulatory non-compliance under GDPR due to unauthorized access to personal data. Additionally, attackers might use the vulnerability as a foothold for further lateral movement within the network. The medium severity rating indicates moderate risk, but the availability of public exploits and lack of vendor response heighten urgency. Organizations with high volumes of customer interactions or sensitive data processed through LigeroSmart are particularly at risk. The vulnerability could also disrupt service availability if exploited to inject malicious scripts that degrade system performance or cause denial of service.

Since no official patch is currently available, European organizations should implement several targeted mitigations: 1) Deploy web application firewalls (WAFs) with custom rules to detect and block malicious payloads targeting the TicketID parameter in the /otrs/index.pl?Action=AgentTicketZoom endpoint. 2) Implement strict input validation and output encoding on the TicketID parameter at the application or proxy level to neutralize script injection attempts. 3) Educate support agents and users to avoid clicking on suspicious or unsolicited links, especially those containing unusual query parameters. 4) Monitor web server logs and application logs for anomalous requests containing suspicious TicketID values indicative of exploitation attempts. 5) Restrict access to the LigeroSmart interface to trusted networks or VPNs to reduce exposure. 6) Consider temporary disabling or restricting the vulnerable functionality if feasible until a patch is released. 7) Maintain up-to-date backups and incident response plans to quickly recover from potential compromises. 8) Engage with the LigeroSmart vendor or community to track patch releases and apply updates promptly once available.