It was found that the Apache Syncope EndUser UI login page prio to 2.0.15 and 2.1.6 reflects the successMessage parameters. By this mean, a user accessing the Enduser UI could execute javascript code from URL query string.
{ "cpe": "cpe:2.3:a:apache:syncope:*:*:*:*:*:*:*:*", "extracted_events": [ { "introduced": "2.0.0" }, { "fixed": "2.0.15" }, { "introduced": "2.1.0" }, { "fixed": "2.1.6" } ], "source": "CPE_RANGE" }
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2019-17557.json"