CVE-2025-40976 identifies a stored Cross-Site Scripting (XSS) vulnerability in WorkDo's TicketGo product affecting all versions. The vulnerability is due to improper neutralization of user-supplied input in the 'description' parameter of a POST request to the endpoint '/ticketgo-saas/home'. Specifically, the application fails to sanitize or encode input correctly, allowing malicious JavaScript code to be stored on the server and subsequently executed in the browsers of users who view the affected content. This type of vulnerability falls under CWE-79 and is a common web application security issue that can lead to session hijacking, theft of sensitive information, or execution of unauthorized actions within the victim's session context. The CVSS 4.0 vector indicates the attack can be performed remotely without authentication (AV:N, PR:L means low privileges required), but user interaction is necessary (UI:P) for the malicious script to execute. The vulnerability impacts confidentiality and integrity with limited availability impact. No patches or known exploits are currently available, but the presence of this vulnerability in all versions of TicketGo means that any deployment is at risk. The vulnerability was assigned by INCIBE and published in January 2026. The lack of proper input validation highlights a need for improved secure coding practices in the affected product.

For European organizations, exploitation of this stored XSS vulnerability could lead to significant risks including session hijacking, unauthorized access to sensitive data, and potential lateral movement within internal networks if attackers leverage stolen credentials or tokens. Organizations in sectors such as finance, healthcare, and government that rely on TicketGo for ticketing or task management may face confidentiality breaches and integrity violations. Although availability impact is low, the reputational damage and compliance risks (e.g., GDPR violations due to data exposure) could be substantial. The medium CVSS score reflects moderate ease of exploitation combined with impactful consequences. Since the vulnerability requires user interaction, phishing or social engineering campaigns could be used to trigger the exploit. European entities using TicketGo without mitigations are vulnerable to targeted attacks, especially if attackers craft payloads to exploit specific organizational workflows.

Organizations should immediately implement strict input validation and output encoding on the 'description' parameter to neutralize malicious scripts. Employ Content Security Policy (CSP) headers to restrict script execution sources and reduce the impact of potential XSS payloads. Conduct comprehensive code reviews and security testing focusing on user input handling in TicketGo. If possible, isolate or sandbox the TicketGo application to limit lateral movement in case of compromise. Educate users to recognize suspicious links or unexpected content that could trigger XSS attacks. Monitor web application logs for unusual POST requests to '/ticketgo-saas/home' and anomalous user behavior. Since no official patches are currently available, consider deploying Web Application Firewalls (WAFs) with custom rules to detect and block XSS payloads targeting this endpoint. Engage with WorkDo for updates and patches and plan for timely application once released.