Severity: Critical
CVSS Score: 10
Swagger is a standardized library for documenting API endpoints and their parameters. Swagger uses a JSON document to organize API endpoint parameter data. Swagger-UI version 2.1.4 contains a cross site scripting (XSS) vulnerability in the `consumes` and `produces` parameters of the swagger json document for a given API. A maliciously crafted swagger JSON doc can be loaded via the URL query-string parameter `url`. To exploit the vulnerability, an attacker would convince a user to visit a malicious url crafted in the following format: ``` http://<USER_HOSTNAME>/swagger-ui/index.html?url=http://<MALICIOUS_HOSTNAME>/malicious-swagger-file.json ```` This issue is being disclosed before a public patched release is available due to the issue being made public in a Github issue.