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Findings

CVE-2021-42237

Sitecore XP Remote Command Execution Vulnerability

Published Nov 5, 2021 · updated Jul 9, 2026 · sitecore experience platform

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.

Code

The project this record applies to. Exploit listings stay in References.

No public source repository is identified for this product.

Timeline

Detection, updates, and resolution for this record.

  1. Nov 5, 2021 · Catalog

    Detected

    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.

  2. Mar 25, 2022 · CISA KEV

    Known exploited

    Apply updates per vendor instructions.

  3. Apr 15, 2022 · CISA KEV

    Remediation due

    Apply updates per vendor instructions.

  4. Jul 9, 2026 · Catalog

    Updated

    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.

Required action

Apply updates per vendor instructions.

CISA due date Apr 15, 2022

Affected

  • cpe sitecore/experience platform7.5
  • cpe sitecore/experience platform8.0
  • vendor Sitecore XPversion unspecified

Sources

  • CISA KEVConfirmed exploitationCVE-2021-42237

    Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.

    cisa.gov
  • CVE.orgVulnerability recordCVE-2021-42237

    Official CVE identifier

    cve.org
  • FIRST EPSSExploitation probabilityCVE-2021-42237

    30-day exploitation probability 97.6%

    first.org
  • Metasploit ModulesPublic exploit moduleexploit_windows/http/sitecore_xp_cve_2021_42237

    Public module reference (excellent). Module source is not copied into this catalog.

    rapid7.com
  • NIST NVDVulnerability recordCVE-2021-42237

    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.

    nvd.nist.gov
  • Packet Storm SecurityCited referencehttp://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html

    Packet Storm link already published on the finding.

    packetstormsecurity.com

References