The WorklogPRO - Jira Timesheets plugin in the Jira Data Center before 4.24.1-jira9, 4.24.1-jira10, and 4.24.1-jira11 allows attackers to inject arbitrary HTML or JavaScript via XSS. This is exploited via a crafted payload placed in the name of a filter. This code is executed in the browser when the user attempts to create a timesheet with the filter timesheet type on the custom timesheet dialog because the filter name is not properly sanitized during the action.