Security advisory

{
  "id": "ccb385e139840aaa4e9166b891159a88818ab14e18b12b1fc75331031da174a1",
  "url": "https://osv.dev/vulnerability/CVE-2021-20293",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-20293",
    "summary": "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.",
    "evidence": "osv:CVE-2021-20293",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-20293",
      "aliases": [
        "CVE-2021-20293",
        "GHSA-5h26-c766-g93v"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/resteasy/resteasy",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "21ace631dfc75b169b7d762ab6ce65c67e5a0b43"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:redhat:resteasy:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "4.6.0"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "4.6.0.Final",
            "4.4.2.Final",
            "4.4.1.Final",
            "4.4.0.Final",
            "4.4.0.CR1",
            "4.3.0.Final",
            "4.2.0.Final",
            "4.1.0.Final",
            "4.0.0.CR2",
            "4.0.0.CR1",
            "4.0.0.Beta7",
            "4.0.0.Beta6",
            "4.0.0.Beta5",
            "4.0.0.Beta4",
            "4.0.0.Beta3",
            "4.0.0.Beta2",
            "4.0.0.Beta1",
            "3.1.4.Final",
            "3.1.3.Final",
            "3.1.2.Final",
            "3.1.1.Final",
            "3.1.0.Beta1",
            "3.1.0.Final",
            "3.1.0.CR3",
            "3.1.0.CR2",
            "3.1.0.CR1",
            "3.1.0.Beta2",
            "3.0.16.Final",
            "3.0.15.Final",
            "3.0.14.Final",
            "3.0.13.Final",
            "3.0.10.Final",
            "3.0.9.Final",
            "3.0.8.Final",
            "3.0.7.Final",
            "3.0.6.Final",
            "3.0.5.Final",
            "3.0.4",
            "3.0.2",
            "3.0.1.Final",
            "3.0.0.Final",
            "3.0-rc-1",
            "3.0-beta-6",
            "3.0-beta-5",
            "3.0-beta-4",
            "3.0-beta-3",
            "3.0-beta-2",
            "3.0-beta-1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-20293.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:51.373812729Z",
      "provider": "osv",
      "references": [
        "https://security.netapp.com/advisory/ntap-20210727-0005/",
        "https://bugzilla.redhat.com/show_bug.cgi?id=1942819"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-20293",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 437463,
  "published_at": "2021-06-10T12:15:07.947+00:00"
}