{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "versions": [
              {
                "introduced": "0"
              },
              {
                "last_affected": "3.3.16"
              }
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "last_affected": "e58b89e1efbd7e9cd3c9782c42d7f83ff0e74aad"
            }
          ],
          "repo": "https://github.com/getsimplecms/getsimplecms",
          "type": "GIT"
        }
      ]
    }
  ],
  "details": "A Reflected Cross-Site Scripting (XSS) vulnerability in GetSimple CMS v3.3.16, in the admin/index.php login portal webpage, allows remote attackers to execute JavaScript code in the client's browser and harvest login credentials after a client clicks a link, enters credentials, and submits the login form.",
  "id": "CVE-2020-23839",
  "modified": "2026-03-15T21:49:18.789692759Z",
  "published": "2020-09-01T17:15:12.310Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "http://packetstormsecurity.com/files/162016/GetSimple-CMS-3.3.16-Cross-Site-Scripting-Shell-Upload.html"
    },
    {
      "type": "ADVISORY",
      "url": "https://github.com/boku7/CVE-2020-23839"
    },
    {
      "type": "ADVISORY",
      "url": "https://www.exploit-db.com/exploits/49726"
    },
    {
      "type": "EVIDENCE",
      "url": "https://github.com/GetSimpleCMS/GetSimpleCMS/issues/1330"
    }
  ],
  "severity": [
    {
      "score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
      "type": "CVSS_V3"
    }
  ]
}