Security advisory

{
  "id": "c4dc98be81cb88f41dd15918f1d14c16efeb141ad9168f386bf93ed47633240d",
  "url": "https://osv.dev/vulnerability/CVE-2021-4124",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4124",
    "summary": "janus-gateway is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
    "evidence": "osv:CVE-2021-4124",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-4124",
      "aliases": [
        "CVE-2021-4124"
      ],
      "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/meetecho/janus-gateway",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "ed0ec46507950a2cc8fbf13c9fe084c0e2ced2b0"
                },
                {
                  "fixed": "f62bba6513ec840761f2434b93168106c7c65a3d"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:meetecho:janus:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "0.11.6"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "f62bba6513ec840761f2434b93168106c7c65a3d"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "v0.11.6",
            "v0.11.5",
            "v0.11.4",
            "v0.11.3",
            "v0.11.2",
            "v0.11.1",
            "v0.10.10",
            "v0.10.9",
            "v0.10.8",
            "v0.10.7",
            "v0.10.6",
            "v0.10.5",
            "v0.10.4",
            "v0.10.3",
            "v0.10.2",
            "v0.10.1",
            "v0.10.0",
            "v0.9.5",
            "v0.9.4",
            "v0.9.3",
            "v0.9.2",
            "v0.9.1",
            "v0.9.0",
            "v0.8.2",
            "v0.8.1",
            "v0.8.0",
            "v0.7.6",
            "v0.7.5",
            "v0.7.4",
            "v0.7.3",
            "v0.7.2",
            "v0.7.1",
            "v0.7.0",
            "v0.6.3",
            "v0.6.2",
            "v0.6.1",
            "v0.6.0",
            "v0.5.0",
            "v0.4.5",
            "v0.4.4",
            "v0.4.3",
            "v0.4.2",
            "v0.4.1",
            "v0.4.0-broken",
            "v0.3.1",
            "v0.3.0",
            "v0.2.6",
            "v0.2.5",
            "v0.2.4",
            "v0.2.3",
            "v0.2.2",
            "v0.2.1",
            "v0.2.0",
            "v0.1.2",
            "v0.1.1",
            "v0.1.0",
            "v0.0.9"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4124.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:58.057453770Z",
      "provider": "osv",
      "references": [
        "https://github.com/meetecho/janus-gateway/commit/f62bba6513ec840761f2434b93168106c7c65a3d",
        "https://huntr.dev/bounties/a6ca142e-60aa-4d6f-b231-5d1bcd1b7190"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-4124",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386576,
  "published_at": "2021-12-16T14:15:08.187+00:00"
}