{
  "schemaVersion": 1,
  "attribution": [
    {
      "source": "CISA Known Exploited Vulnerabilities",
      "url": "https://www.cisa.gov/known-exploited-vulnerabilities-catalog",
      "licence": "US government work"
    },
    {
      "source": "GitHub Advisory Database",
      "url": "https://github.com/advisories",
      "licence": "CC BY 4.0"
    },
    {
      "source": "Have I Been Pwned",
      "url": "https://haveibeenpwned.com/",
      "licence": "CC BY 4.0"
    },
    {
      "source": "CVE Program (CVE records)",
      "url": "https://www.cve.org/Legal/TermsOfUse",
      "licence": "CVE Terms of Use",
      "notice": "Copyright © 1999-2026, The MITRE Corporation. CVE is a trademark and the CVE logo is a registered trademark of The MITRE Corporation.",
      "terms": "CVE Usage: MITRE hereby grants you a perpetual, worldwide, non-exclusive, no-charge, royalty-free, irrevocable copyright license to reproduce, prepare derivative works of, publicly display, publicly perform, sublicense, and distribute Common Vulnerabilities and Exposures (CVE™). Any copy you make for such purposes is authorized provided that you reproduce MITRE's copyright designation and this license in any such copy."
    },
    {
      "source": "FIRST EPSS",
      "url": "https://www.first.org/epss/",
      "licence": "free to use; FIRST requests attribution"
    }
  ],
  "record": {
    "id": "CVE-2021-28807",
    "sourceURL": "https://www.cve.org/CVERecord?id=CVE-2021-28807",
    "idYear": 2021,
    "status": "PUBLISHED",
    "publishedAt": "2021-06-03T02:45:14.015Z",
    "updatedAt": "2024-09-16T17:17:48.672Z",
    "importedAt": "2026-10-24T01:56:26.894Z",
    "snapshot": {
      "id": "cve_2026-10-24_midnight_baseline",
      "at": "2026-10-24T00:00:00.000Z",
      "source": "https://github.com/CVEProject/cvelistV5/releases/tag/cve_2026-10-24_0100Z"
    },
    "facts": {
      "title": "Post-Authentication Reflected XSS Vulnerability in Q'center",
      "summary": "A post-authentication reflected XSS vulnerability has been reported to affect QNAP NAS running Q’center. If exploited, this vulnerability allows remote attackers to inject malicious code. QNAP have already fixed this vulnerability in the following versions of Q’center: QTS 4.5.3: Q’center v1.12.1012 and later QTS 4.3.6: Q’center v1.10.1004 and later QTS 4.3.3: Q’center v1.10.1004 and later QuTS hero h4.5.2: Q’center v1.12.1012 and later QuTScloud c4.5.4: Q’center v1.12.1012 and later",
      "affected": [
        {
          "vendor": "QNAP Systems Inc.",
          "product": "Q’center",
          "platforms": [
            "QTS 4.5.3"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v1.12.1012"
            }
          ]
        },
        {
          "vendor": "QNAP Systems Inc.",
          "product": "Q’center",
          "platforms": [
            "QTS 4.3.6"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v1.10.1004"
            }
          ]
        },
        {
          "vendor": "QNAP Systems Inc.",
          "product": "Q’center",
          "platforms": [
            "QTS 4.3.3"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v1.10.1004"
            }
          ]
        },
        {
          "vendor": "QNAP Systems Inc.",
          "product": "Q’center",
          "platforms": [
            "QuTS hero h4.5.2"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v1.12.1012"
            }
          ]
        },
        {
          "vendor": "QNAP Systems Inc.",
          "product": "Q’center",
          "platforms": [
            "QuTScloud c4.5.4"
          ],
          "versions": [
            {
              "version": "unspecified",
              "status": "affected",
              "versionType": "custom",
              "lessThan": "v1.12.1012"
            }
          ]
        }
      ]
    }
  }
}