MediaWiki before 1.27.4, 1.28.x before 1.28.3, and 1.29.x before 1.29.2 has XSS when the $wgShowExceptionDetails setting is false and the browser sends non-standard URL escaping.
"https://storage.googleapis.com/osv-test-cve-osv-conversion/osv-output/CVE-2017-8808.json"