Security advisory

{
  "id": "7f2c647585bcccb59b458e0b2db36243d5fd2ecbcec101664bc9f1ed765398e4",
  "url": "https://osv.dev/vulnerability/CVE-2021-4072",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-4072",
    "summary": "elgg is vulnerable to Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')",
    "evidence": "osv:CVE-2021-4072",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-4072",
      "aliases": [
        "CVE-2021-4072",
        "GHSA-2xw8-j43j-5vxp"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/elgg/elgg",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "a5eca411c67d91a5622466d6dc341833a8a73a52"
                },
                {
                  "fixed": "c30b17bf75256ed3fcc84e2083147cc3951423d0"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:elgg:elgg:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "3.3.24"
                      }
                    ],
                    "source": "CPE_RANGE"
                  },
                  {
                    "range": [
                      {
                        "fixed": "c30b17bf75256ed3fcc84e2083147cc3951423d0"
                      }
                    ],
                    "source": "REFERENCES_COMMIT"
                  }
                ]
              }
            }
          ],
          "versions": [
            "3.3.23",
            "3.3.22",
            "3.3.21",
            "3.3.20",
            "3.3.19",
            "3.3.18",
            "3.3.17",
            "3.3.16",
            "3.3.15",
            "3.3.14",
            "3.3.13",
            "3.3.12",
            "3.3.11",
            "3.3.10",
            "3.3.9",
            "3.3.8",
            "3.3.7",
            "3.3.6",
            "3.3.5",
            "3.3.4",
            "3.3.3",
            "3.3.2",
            "3.3.1",
            "3.3.0",
            "3.2.0",
            "3.1.0",
            "3.0.0-rc.1",
            "3.0.0-beta.3",
            "3.0.0-beta.1",
            "3.0.0-beta.2",
            "2.0.0-alpha.3",
            "2.0.0-alpha.2",
            "2.0.0-alpha.1",
            "1.8.1b1",
            "1.5.0",
            "1.7.0b1",
            "1.5.0rc2",
            "1.5.0rc1",
            "1.2",
            "1.1",
            "1.1rc1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-4072.json"
          }
        }
      ],
      "modified": "2026-10-20T10:54:56.369419926Z",
      "provider": "osv",
      "references": [
        "https://github.com/elgg/elgg/commit/c30b17bf75256ed3fcc84e2083147cc3951423d0",
        "https://huntr.dev/bounties/74034253-732a-4251-a0f9-eca5f576c955"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-4072",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386494,
  "published_at": "2021-12-24T14:15:07.327+00:00"
}