{"cve":"CVE-2021-20293","nvd":{"published":"2021-06-10T12:15:07.947","modified":"2026-06-17T03:33:37.257","status":"Modified","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.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79"],"references":["https://bugzilla.redhat.com/show_bug.cgi?id=1942819","https://security.netapp.com/advisory/ntap-20210727-0005/","https://bugzilla.redhat.com/show_bug.cgi?id=1942819","https://security.netapp.com/advisory/ntap-20210727-0005/"],"products":["netapp:oncommand_insight","redhat:resteasy"],"source":"nvd","synced_at":"2026-10-19T21:20:07.141963181+00:00"},"epss":{"cve":"CVE-2021-20293","score":0.00856,"percentile":0.58398,"date":"2026-11-01"},"kev":null,"osv":[{"id":"GHSA-5h26-c766-g93v","url":"https://osv.dev/vulnerability/GHSA-5h26-c766-g93v","summary":"Cross-Site Scripting","modified":"2024-02-17T05:36:30.211027Z","packages":[{"ecosystem":"Maven","name":"org.jboss.resteasy:resteasy-bom","purl":"pkg:maven/org.jboss.resteasy/resteasy-bom","ranges":["<=4.6.0.Final"],"fixed":[]},{"ecosystem":"Maven","name":"org.jboss.resteasy:resteasy-core","purl":"pkg:maven/org.jboss.resteasy/resteasy-core","ranges":["<=4.6.0.Final"],"fixed":[]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}