# 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.

- Page: https://www.vulneraibility.com/cve/CVE-2021-42237
- CVSS: 9.8
- Known exploited: yes, in CISA KEV since 2022-03-25; CISA due date 2022-04-15; known ransomware use
- EPSS: 97.40% (percentile 99.9)
- Public exploit code: 1 Metasploit module · 3 GitHub proofs of concept · 1 Nuclei template (first 2022-01-16)
- CISA SSVC: exploitation active, automatable yes, technical impact total (assessed 2025-02-03)
- Weakness: CWE-502
- Published: 2021-11-05

## Affected

- sitecore:experience_platform

## References

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

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Summary, impact and action are written by the vulneraibility.com AI analysis pipeline from the CVE record, NVD, CISA and FIRST data; verify against the references.