CVE-2025-67824 is a stored cross-site scripting (XSS) vulnerability affecting the WorklogPRO - Jira Timesheets plugin in Jira Data Center versions before 4.24.1-jira9, 4.24.1-jira10, and 4.24.1-jira11. The vulnerability arises because the plugin fails to properly sanitize the filter name input, allowing attackers to inject arbitrary HTML or JavaScript code. This malicious payload is stored in the filter name and executed in the victim's browser when they attempt to create a timesheet using the filter timesheet type on the custom timesheet dialog. The attack vector involves crafting a specially designed filter name containing the XSS payload. When a user interacts with the timesheet creation interface, the injected script runs with the user's browser privileges, potentially enabling session hijacking, credential theft, or further client-side attacks. The vulnerability does not require prior authentication to inject the payload, but user interaction is necessary to trigger the execution. There are no known public exploits at this time, but the risk remains significant given the widespread use of Jira Data Center in enterprise environments. The lack of a CVSS score necessitates a severity assessment based on the vulnerability's characteristics. The plugin versions affected are used in Jira Data Center, a product widely adopted by large organizations for issue tracking and project management, increasing the potential impact. The vulnerability highlights the importance of proper input validation and output encoding in web applications, especially in plugins that extend core enterprise software.

For European organizations, this vulnerability poses a significant risk to confidentiality and integrity of user sessions and data within Jira Data Center environments. Successful exploitation could allow attackers to execute arbitrary scripts in the context of the victim's browser, leading to session hijacking, unauthorized actions, or data exfiltration. Given Jira's role in managing sensitive project and issue data, such attacks could disrupt business operations, leak confidential information, or facilitate further network intrusion. The impact is amplified in environments where multiple users have access to Jira and rely on the WorklogPRO plugin for timesheet management. Additionally, the vulnerability could be leveraged as a foothold for lateral movement within an organization's network. The absence of known exploits reduces immediate risk but does not eliminate the threat, especially as attackers often weaponize such vulnerabilities once disclosed. European organizations with strict data protection regulations (e.g., GDPR) must consider the compliance implications of potential data breaches resulting from this vulnerability.

Organizations should promptly update the WorklogPRO - Jira Timesheets plugin to version 4.24.1-jira9 or later, as these versions address the vulnerability by properly sanitizing filter names. Until updates can be applied, administrators should restrict access to the timesheet creation functionality or disable the plugin if feasible. Implementing web application firewalls (WAFs) with rules to detect and block suspicious input patterns related to filter names can provide temporary protection. Conduct thorough input validation and output encoding on all user-supplied data within custom plugins or integrations to prevent similar issues. Educate users about the risks of interacting with untrusted filters or timesheets and encourage vigilance against suspicious activity. Regularly audit Jira plugin versions and configurations to ensure they are up to date and securely configured. Monitoring logs for unusual filter creation or timesheet activity may help detect attempted exploitation. Finally, coordinate with Atlassian support and plugin vendors for timely security advisories and patches.