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Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')


Severity Medium
Score 6.1/10


swagger-ui prior to 2.2.1 is vulnerable to cross-site scripting. This vulnerability exists because swagger-ui automatically executes external Javascript that is loaded in via the url query string parameter when a Content-Type: application/javascript header is included. An attacker can create a server that replies with a malicious script and the proper content-type, and then craft a swagger-ui URL that includes the location to their server/script in the url query string parameter. When viewed, such a link would execute the attacker's malicious script.

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  • NONE
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CWE-79 - Cross Site Scripting

Cross-Site Scripting, commonly referred to as XSS, is the most dominant class of vulnerabilities. It allows an attacker to inject malicious code into a pregnable web application and victimize its users. The exploitation of such a weakness can cause severe issues such as account takeover, and sensitive data exfiltration. Because of the prevalence of XSS vulnerabilities and their high rate of exploitation, it has remained in the OWASP top 10 vulnerabilities for years.

Advisory Timeline

  • Published