What’s Vulnerable › Vulnerabilities

CVE-2021-42237: Sitecore XP Remote Command Execution Vulnerability

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: yes — in CISA KEV since 2022-03-25
• EPSS: 97.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2021-11-05 · updated 2026-07-09
• Weakness: CWE-502

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.

Affected products

• Sitecore Experience Platform: 7.5, 7.5-update1, 7.5-update2, 8.0, 8.0-sp1, 8.0-update1 (+18)

References

• http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html
• https://blog.assetnote.io/2021/11/02/sitecore-rce/
• https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776
• http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html
• https://blog.assetnote.io/2021/11/02/sitecore-rce/
• https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776
• https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237

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