CVE-2021-47733 (GCVE-0-2021-47733)
Vulnerability from cvelistv5
Published
2025-12-23 19:35
Modified
2025-12-23 19:35
Severity ?
5.1 (Medium) - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
6.1 (Medium) - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
CWE
  • CWE-79 - Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Summary
CMSimple 5.4 contains a cross-site scripting vulnerability that allows attackers to bypass input filtering by using HTML to Unicode encoding. Attackers can inject malicious scripts by encoding payloads like ')-alert(1)// and execute arbitrary JavaScript when victims interact with delete buttons.
References
Impacted products
Vendor Product Version
Cmsimple CMSimple Version: <=5.4
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          "vendor": "Cmsimple",
          "versions": [
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      ],
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            "confidentialityImpact": "LOW",
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            "privilegesRequired": "NONE",
            "scope": "CHANGED",
            "userInteraction": "REQUIRED",
            "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N",
            "version": "3.1"
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      "problemTypes": [
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            {
              "cweId": "CWE-79",
              "description": "Improper Neutralization of Input During Web Page Generation (\u0027Cross-site Scripting\u0027)",
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              "type": "CWE"
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      "providerMetadata": {
        "dateUpdated": "2025-12-23T19:35:44.454Z",
        "orgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
        "shortName": "VulnCheck"
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          "tags": [
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        },
        {
          "name": "CMSimple Official Homepage",
          "tags": [
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          "url": "https://www.cmsimple.org/en/"
        },
        {
          "name": "VulnCheck Advisory: CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding",
          "tags": [
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          "url": "https://www.vulncheck.com/advisories/cmsimple-cross-site-scripting-via-html-unicode-encoding"
        }
      ],
      "title": "CMSimple 5.4 Cross-Site Scripting via HTML Unicode Encoding",
      "x_generator": {
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  },
  "cveMetadata": {
    "assignerOrgId": "83251b91-4cc7-4094-a5c7-464a1b83ea10",
    "assignerShortName": "VulnCheck",
    "cveId": "CVE-2021-47733",
    "datePublished": "2025-12-23T19:35:44.454Z",
    "dateReserved": "2025-12-23T13:24:04.579Z",
    "dateUpdated": "2025-12-23T19:35:44.454Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
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  }
}


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