Security advisory

{
  "id": "2f29cddd254939de4e51e1a9dba9bbeeea0c0ddb11724e601e02cb291d80baa6",
  "url": "https://osv.dev/vulnerability/CVE-2021-42561",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-42561",
    "summary": "An issue was discovered in CALDERA 2.8.1. When activated, the Human plugin passes the unsanitized name parameter to a python \"os.system\" function. This allows attackers to use shell metacharacters (e.g., backticks \"``\" or dollar parenthesis \"$()\" ) in order to escape the current command and execute arbitrary shell commands.",
    "evidence": "osv:CVE-2021-42561",
    "products": [],
    "severity": "high",
    "structured": {
      "id": "CVE-2021-42561",
      "aliases": [
        "CVE-2021-42561"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/apache/caldera",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "last_affected": "29b1f26239ca1819c110cdab96de22938ce01450"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:mitre:caldera:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "last_affected": "2.8.1"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "2.8.1",
            "2.8.0",
            "2.7.0",
            "2.6.65",
            "2.6.64",
            "2.6.6",
            "2.6.5",
            "2.6.4",
            "2.6.3",
            "2.6.2",
            "2.6.1",
            "2.6.0",
            "2.3.1",
            "2.3.0",
            "2.1.0",
            "2.0.0"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-42561.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:00.826807515Z",
      "provider": "osv",
      "references": [
        "https://github.com/mitre/caldera/releases",
        "https://github.com/DrunkenShells/Disclosures/tree/master/CVE-2021-42561-Command%20Injection%20Via%20the%20Human%20Plugin-MITRE%20Caldera"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-42561",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386681,
  "published_at": "2022-01-12T19:15:08.33+00:00"
}