In OpenMRS 2.9 and prior, the UI Framework Error Page reflects arbitrary, user-supplied input back to the browser, which can result in XSS. Any page that is able to trigger a UI Framework Error is susceptible to this issue.
The Reporting Compatibility Add On before 2.0.4 for OpenMRS, as distributed in OpenMRS Reference Application before 2.6.1, does not authenticate users when deserializing XML input into ReportSchema objects. The result is that remote unauthenticated users are able to execute operating system commands by crafting malicious XML payloads, as demonstrated by a single admin/reports/reportSchemaXml.form request.