CVE-2021-42237
Sitecore XP Remote Command Execution Vulnerability
Does this matter?
Known to be exploited in the wild (CISA KEV, CISA remediation deadline 15 April 2022). Treat as an emergency change: patch or isolate now, then hunt for prior compromise.
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.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 97.57% probability · 100th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Listed 25 March 2022 · due 15 April 2022 · used in ransomware campaigns
- Weakness
- CWE-502
- Affected
- sitecore/experience platform
- Source
- cve@mitre.org
EPSS 97.6% since 30 October 2026; no change recorded yet. The dashed line is the ten per cent mark our analysts treat as “patch before the next change window”. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
CISA notes
Apply updates per vendor instructions. https://nvd.nist.gov/vuln/detail/CVE-2021-42237
References
- http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
- https://blog.assetnote.io/2021/11/02/sitecore-rce/Exploit, Third Party Advisory
- https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776Vendor Advisory
- http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.htmlThird Party Advisory, VDB Entry
- https://blog.assetnote.io/2021/11/02/sitecore-rce/Exploit, Third Party Advisory
- https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237US Government Resource
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.