jQuery before 1.9.0 is vulnerable to Cross-site Scripting (XSS) attacks. The jQuery(strInput) function does not differentiate selectors from HTML in a reliable fashion. In vulnerable versions, jQuery determined whether the input was HTML by looking for the '<' character anywhere in the string, giving attackers more flexibility when attempting to construct a malicious payload. In fixed versions, jQuery only deems the input to be HTML if it explicitly starts with the '<' character, limiting exploitability only to attackers who can control the beginning of a string, which is far less common.
As a workaround, you can do the following:
- Delete webadmin.war from the webapps folder.
- Download latest 1.x jQuery (e.g. 1.12.4)
- Edit the following HTML files to point to the new version of jQuery
- Restart Mirth Connect