It was discovered in Undertow that the code that parsed the HTTP request line permitted invalid characters. This could be exploited, in conjunction with a proxy that also permitted the invalid characters but with a different interpretation, to inject data into the HTTP response. By manipulating the HTTP response the attacker could poison a web-cache, perform an XSS attack, or obtain sensitive information from requests other than their own.
{ "nvd_published_at": null, "github_reviewed_at": "2020-06-16T21:45:55Z", "severity": "MODERATE", "github_reviewed": true, "cwe_ids": [ "CWE-444" ] }