Security advisory

{
  "id": "8a13c2d67518789c3f762bbd2f85e87dd539baa9be30881e5283bc2d1443fd35",
  "url": "https://osv.dev/vulnerability/CVE-2021-47768",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2021-47768",
    "summary": "ImportExportTools NG 10.0.4 contains a persistent HTML injection vulnerability in the email export module that allows remote attackers to inject malicious HTML payloads. Attackers can send emails with crafted HTML in the subject that execute during HTML export, potentially compromising user data or session credentials.",
    "evidence": "osv:CVE-2021-47768",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2021-47768",
      "aliases": [
        "CVE-2021-47768"
      ],
      "metrics": [
        {
          "type": "CVSS_V4",
          "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/thunderbird/import-export-tools-ng",
              "type": "GIT",
              "events": [
                {
                  "introduced": "63e002c18764e5ccbe6fcbf2eb3c4b613007804c"
                },
                {
                  "last_affected": "63e002c18764e5ccbe6fcbf2eb3c4b613007804c"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:cleidigh:importexporttools_ng:10.0.4:*:*:*:*:thunderbird:*:*",
                    "range": [
                      {
                        "introduced": "10.0.4"
                      },
                      {
                        "last_affected": "10.0.4"
                      }
                    ],
                    "source": "CPE_STRING"
                  }
                ]
              }
            }
          ],
          "versions": [
            "10.0.4",
            "v10.0.4"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2021-47768.json"
          }
        }
      ],
      "modified": "2026-10-20T10:55:13.251157223Z",
      "provider": "osv",
      "references": [
        "https://addons.thunderbird.net/en-US/thunderbird/addon/importexporttools-ng/",
        "https://www.vulnerability-lab.com/get_content.php?id=2308",
        "https://github.com/thundernest/import-export-tools-ng",
        "https://www.exploit-db.com/exploits/50496"
      ],
      "provider_metadata": {}
    },
    "related_cves": [
      {
        "value": "CVE-2021-47768",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 387066,
  "published_at": "2026-01-15T16:16:08.34+00:00"
}