In short
- CVE-2021-20293 is a MEDIUM (CVSS 6.1) vulnerability affecting org.jboss.resteasy:resteasy-bom, org.jboss.resteasy:resteasy-core, resteasy (redhat).
- Chance of exploitation in the next 30 days (EPSS): 0.86%, higher than 58.4% of all vulnerabilities.
- No patched version is listed yet: follow the vendor's advisory in References.
Description
A reflected Cross-Site Scripting (XSS) flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final, where it did not properly handle URL encoding when calling @javax.ws.rs.PathParam without any @Produces MediaType. This flaw allows an attacker to launch a reflected XSS attack. The highest threat from this vulnerability is to data confidentiality and integrity.
NVD description
A reflected Cross-Site Scripting (XSS) flaw was found in RESTEasy in all versions of RESTEasy up to 4.6.0.Final, where it did not properly handle URL encoding when calling @javax.ws.rs.PathParam without any @Produces MediaType. This flaw allows an attacker to launch a reflected XSS attack. The highest threat from this vulnerability is to data confidentiality and integrity.
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