FKIE_CVE-2021-42237

Vulnerability from fkie_nvd - Published: 2021-11-05 10:15 - Updated: 2026-07-09 13:57
Severity
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
9.8 (Critical) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Summary
Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability.
References
cve@mitre.orghttp://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
cve@mitre.orghttps://blog.assetnote.io/2021/11/02/sitecore-rce/Exploit, Third Party Advisory
cve@mitre.orghttps://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776Vendor Advisory
af854a3a-2127-422b-91ae-364da2661108http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
af854a3a-2127-422b-91ae-364da2661108https://blog.assetnote.io/2021/11/02/sitecore-rce/Exploit, Third Party Advisory
af854a3a-2127-422b-91ae-364da2661108https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776Vendor Advisory
134c704f-9b21-4f2e-91b3-4a467353bcc0https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237US Government Resource
Impacted products
Vendor Product Version
sitecore experience_platform 7.5
sitecore experience_platform 7.5
sitecore experience_platform 7.5
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.0
sitecore experience_platform 8.1
sitecore experience_platform 8.1
sitecore experience_platform 8.1
sitecore experience_platform 8.1
sitecore experience_platform 8.2
sitecore experience_platform 8.2
sitecore experience_platform 8.2
sitecore experience_platform 8.2
sitecore experience_platform 8.2
sitecore experience_platform 8.2
sitecore experience_platform 8.2
sitecore experience_platform 8.2
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "cisaActionDue": "2022-04-15",
  "cisaExploitAdd": "2022-03-25",
  "cisaRequiredAction": "Apply updates per vendor instructions.",
  "cisaVulnerabilityName": "Sitecore XP Remote Command Execution Vulnerability",
  "configurations": [
    {
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          "negate": false,
          "operator": "OR"
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      ]
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  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Sitecore XP 7.5 Initial Release to Sitecore XP 8.2 Update-7 is vulnerable to an insecure deserialization attack where it is possible to achieve remote command execution on the machine. No authentication or special configuration is required to exploit this vulnerability."
    },
    {
      "lang": "es",
      "value": "Sitecore XP Versi\u00f3n Inicial 7.5 a Sitecore XP 8.2 Update-7, es vulnerable a un ataque de deserializaci\u00f3n no segura donde es posible lograr una ejecuci\u00f3n de comandos remotos en la m\u00e1quina. No es requerida ninguna autenticaci\u00f3n ni configuraci\u00f3n especial para explotar esta vulnerabilidad"
    }
  ],
  "id": "CVE-2021-42237",
  "lastModified": "2026-07-09T13:57:14.483",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "HIGH",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "COMPLETE",
          "baseScore": 10.0,
          "confidentialityImpact": "COMPLETE",
          "integrityImpact": "COMPLETE",
          "vectorString": "AV:N/AC:L/Au:N/C:C/I:C/A:C",
          "version": "2.0"
        },
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        "impactScore": 10.0,
        "obtainAllPrivilege": false,
        "obtainOtherPrivilege": false,
        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
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          "confidentialityImpact": "HIGH",
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          "attackVector": "NETWORK",
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          "baseSeverity": "CRITICAL",
          "confidentialityImpact": "HIGH",
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          "privilegesRequired": "NONE",
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
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            },
            {
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            },
            {
              "technicalImpact": "total"
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          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-02-03T14:09:16.771279Z",
          "version": "2.0.3"
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  "published": "2021-11-05T10:15:08.240",
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      "tags": [
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  "vulnStatus": "Analyzed",
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      "type": "Secondary"
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  ]
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

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Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


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