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Servers and applications

CVE-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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 25 Mar 2022.

Severity
Critical 9.8
Published
5 Nov 2021
Last changed
9 Jul 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Sitecore Experience PlatformServers and applications · cpe:a:sitecore:experience_platform
  • Version 8.2-update7
  • Version 8.2-update6
  • Version 8.2-update5
  • Version 8.2-update4
All 24 release lines
  • Version 7.5
  • Version 7.5-update1
  • Version 7.5-update2
  • Version 8.0
  • Version 8.0-sp1
  • Version 8.0-update1
  • Version 8.0-update2
  • Version 8.0-update3
  • Version 8.0-update4
  • Version 8.0-update5
  • Version 8.0-update6
  • Version 8.0-update7
  • Version 8.1
  • Version 8.1-update1
  • Version 8.1-update2
  • Version 8.1-update3
  • Version 8.2
  • Version 8.2-update1
  • Version 8.2-update2
  • Version 8.2-update3
  • Version 8.2-update4
  • Version 8.2-update5
  • Version 8.2-update6
  • Version 8.2-update7

Known exploited

CISA name
Sitecore XP Remote Command Execution Vulnerability
Required action
Apply updates per vendor instructions.
Due for US agencies
15 Apr 2022
Used in ransomware
Yes, known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2021-42237
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2021-42237