Security advisory

{
  "id": "fd6a5c2e0ef4f28a2fe19c6689ccd6b50ab22b7272fbf9c8f28ec68a73fd7d51",
  "url": "https://osv.dev/vulnerability/CVE-2021-42645",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-42645",
    "summary": "CMSimple_XH 1.7.4 is affected by a remote code execution (RCE) vulnerability. To exploit this vulnerability, an attacker must use the \"File\" parameter to upload a PHP payload to get a reverse shell from the vulnerable host.",
    "evidence": "osv:CVE-2021-42645",
    "products": [],
    "severity": "critical",
    "structured": {
      "id": "CVE-2021-42645",
      "aliases": [
        "CVE-2021-42645"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/cmsimple-xh/cmsimple-xh",
              "type": "GIT",
              "events": [
                {
                  "introduced": "2bd3332504e47710bb6a49f9eccbfffdab377baa"
                },
                {
                  "last_affected": "2bd3332504e47710bb6a49f9eccbfffdab377baa"
                },
                {
                  "fixed": "3f7f66130f2d07433e76031a3948ab959ed688e8"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cmsimple-xh:cmsimple_xh:1.7.4:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "1.7.4"
                      },
                      {
                        "last_affected": "1.7.4"
                      }
                    ],
                    "source": "CPE_STRING"
                  },
                  {
                    "range": [
                      {
                        "fixed": "3f7f66130f2d07433e76031a3948ab959ed688e8"
                      }
                    ],
                    "source": "REFERENCES_TAG",
                    "original_tag": "1.7.5"
                  }
                ]
              }
            }
          ],
          "versions": [
            "1.7.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-42645.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:01.455272134Z",
      "provider": "osv",
      "references": [
        "https://github.com/cmsimple-xh/cmsimple-xh/releases/tag/1.7.5",
        "https://github.com/Net-hunter121/CMSimple_XH-Unauth-RCE"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-42645",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 386709,
  "published_at": "2022-05-10T12:15:08.477+00:00"
}