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Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception.
Sinatra before 2.0.2 has XSS via the 400 Bad Request page that occurs upon a params parser exception. This vulnerability involves weaknesses in
This medium-severity vulnerability could be exploited under certain conditions to compromise security controls or access sensitive information. Should be addressed in a timely manner.
Probability of exploitation in the next 30 days · more likely than 81.7% of all CVEs.
Isolate affected systems from untrusted networks until patching is complete
Implement enhanced monitoring for exploitation attempts and unusual behavior