Security advisory

{
  "id": "301276288094f9221ba5fbcc86d0b134ecd787f3949994c8271af96293a92f59",
  "url": "https://osv.dev/vulnerability/CVE-2016-11020",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2016-11020",
    "summary": "Kunena before 5.0.4 does not restrict avatar file extensions to gif, jpeg, jpg, and png. This can lead to XSS and remote code execution.",
    "evidence": "osv:CVE-2016-11020",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2016-11020",
      "aliases": [
        "CVE-2016-11020"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/kunena/kunena-forum",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "7f7696ce53b7a57c7affa5cf4190e07c5f105383"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:kunena:kunena:*:*:*:*:*:joomla\\!:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "5.0.4"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "5.0.3",
            "5.0.2",
            "5.0.1",
            "5.0.0",
            "5.0.0-RC5",
            "5.0.0-RC4",
            "5.0.0-RC3",
            "5.0.0-RC2",
            "5.0.0-RC1",
            "5.0.0-Beta5",
            "5.0.0-Beta4",
            "5.0.0-Beta3",
            "5.0.0-Beta2",
            "5.0.0-Beta1",
            "4.0.0",
            "4.0.0-RC1",
            "4.0.0-Beta3",
            "4.0.0-Beta2",
            "4.0.0-Beta1",
            "2.0.2",
            "2.0.1",
            "2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2016-11020.json"
          }
        }
      ],
      "modified": "2026-10-20T10:47:36.827980403Z",
      "provider": "osv",
      "references": [
        "https://www.kunena.org/blog/179-kunena-5-0-4-released",
        "https://www.kunena.org/bugs/changelog",
        "https://github.com/Kunena/Kunena-Forum/pull/5028"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2016-11020",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 379579,
  "published_at": "2020-02-25T19:15:10.817+00:00"
}