OMERO.web provides a web based client and plugin infrastructure. There is currently no escaping or validation of the `callback` parameter that can be passed to various OMERO.web endpoints that have JSONP enabled. This vulnerability has been patched in version 5.26.0.
https://github.com/ome/omero-web/security/advisories/GHSA-vr85-5pwx-c6gq
https://github.com/ome/omero-web/commit/d41207cbb82afc56ea79e84db532608aa24ab4aa