CVE-2021-42237
Sitecore XP Remote Command Execution Vulnerability
- Published
- Nov 5, 2021
- Updated
- Jul 9, 2026
- Assigning CNA
- mitre
- Evidence observed
- Mar 25, 2022
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HHigh · next 30 days
- Percentile
- 99.9%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
CISA Known Exploited
This CVE appears in the CISA Known Exploited Vulnerabilities catalog.
Summary
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.
Sources
4- SiteCore-RCE-DetectionScanner
Python script to detect Sitecore Experience Platform pre-auth RCE (CVE-2021-42237) by probing vulnerable Report.ashx endpoints and analyzing HTTP responses.
Proof-of-concept exploit for CVE-2021-42237, a Sitecore RCE vulnerability, demonstrating command execution via crafted XML payload.
- CVE-2021-42237-SiteCore-XPExploit
Automated exploit tool for CVE-2021-42237 targeting SiteCore XP. Reads target URLs from a file and leverages DNSLog for out-of-band detection.
Responsible use
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