Security advisory

{
  "id": "40dbe5527f7707da1ec72ce7b6ebb769e5a5a3222fed6b73a9600d0a30d4ff9e",
  "url": "https://osv.dev/vulnerability/CVE-2020-8821",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-8821",
    "summary": "An Improper Data Validation Vulnerability exists in Webmin 1.941 and earlier affecting the Command Shell Endpoint. A user may enter HTML code into the Command field and submit it. Then, after visiting the Action Logs Menu and displaying logs, the HTML code will be rendered (however, JavaScript is not executed). Changes are kept across users.",
    "evidence": "osv:CVE-2020-8821",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-8821",
      "aliases": [
        "CVE-2020-8821"
      ],
      "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/webmin/webmin",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "d5227e85afec512718dd77a759a56cd212a15c1c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:webmin:webmin:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "1.941"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.941",
            "1.940",
            "1.930",
            "1.920",
            "1.910",
            "1.900",
            "1.890",
            "1.880",
            "1.870",
            "1.860",
            "1.850",
            "1.840",
            "1.831",
            "1.830",
            "1.820",
            "1.810",
            "1.801",
            "1.800",
            "1.790",
            "1.780",
            "1.770",
            "1.760",
            "1.750",
            "1.740",
            "1.730",
            "1.720",
            "1.710",
            "1.700"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-8821.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:17.766616075Z",
      "provider": "osv",
      "references": [
        "https://www.webmin.com/security.html"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2020-8821",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429642,
  "published_at": "2020-10-12T16:15:12.59+00:00"
}