CVE-2021-42237

Published: Nov 5, 2021Updated: Jul 9, 2026 Sources: CVE List NVD BDUCWE-502

9.8CRITICAL

NVD MITRE

Description

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.

No summary for this CVE yet.

CVSS Vector Breakdown

Exploitability

AV:NAttack Vector

Network

AC:LAttack Complexity

Low

PR:NPrivileges Required

None

UI:NUser Interaction

None

Scope

S:UScope

Unchanged

Impact

C:HConfidentiality

High

I:HIntegrity

High

A:HAvailability

High

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Weaknesses

CWE-502

Affected Products

Sitecore

commercialaka sitecore managed cloud, experience platform, experience manager

Sitecore Experience PlatformOn-premWeb App

Web & CMS Plugins / cms-core

experience platformOn-prem

Web & CMS Plugins / cms-core

and 1 more affected products View all →

Exploitability

CISA Known Exploited Vulnerability

Added to KEV:Mar 25, 2022

Remediation due:Apr 15, 2022

Ransomware:Known ransomware use

Required action: Apply updates per vendor instructions.

1 exploit source identified

Exploit details including PoC links, Metasploit modules, and scanner templates are available after registration.

View exploit details

Official Patch Available

Is your org exposed to CVE-2021-42237?Discuss checks for your systems with a specialist. Scope agreed before testing. Check my exposure

Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

3 techniques

Execution

Initial Access

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References

https://nvd.nist.gov/vuln/detail/CVE-2021-42237

nvd.nist.gov

https://blog.assetnote.io/2021/11/02/sitecore-rce/

blog.assetnote.io

https://www.cisa.gov/sites/default/files/csv/known_exploited_vulnerabilities.csv

cisa.gov

and 3 more references View all →

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Exploit details & PoC links

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