Insecure Deserialization Vulnerability in Sitecore XP by Sitecore
CVE-2021-42237

9.8CRITICAL

Key Information:

Vendor: Sitecore
Status: Experience Platform
Vendor: CVE Published:; 5 November 2021

Badges

💰 Ransomware👾 Exploit Exists🟡 Public PoC🟣 EPSS 94%🦅 CISA Reported

What is CVE-2021-42237?

The Sitecore XP platform, ranging from the initial release of version 7.5 to update 8.2 Update-7, is susceptible to an insecure deserialization flaw. This vulnerability allows attackers to execute arbitrary remote commands on the host system without the need for authentication or any special configuration, effectively compromising the security of the affected installations. Organizations utilizing these versions of Sitecore XP should prioritize remediation efforts to mitigate this significant risk.

CISA has reported CVE-2021-42237

CISA provides regional cyber and physical services to support security and resilience across the United States. CISA monitor the most dangerious vulnerabilities and have identifed CVE-2021-42237 as being exploited and is known by the CISA as enabling ransomware campaigns.

The CISA's recommendation is: Apply updates per vendor instructions.

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

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