CVE-2021-42237

Known Exploited Public Exploit

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.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 94.37% Top 5%
KEV Since 
Vendor Advisory sitecore.com Vendor Advisory sitecore.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
http://sitecore.com vendor advisory
https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776 vendor advisory
https://blog.assetnote.io/2021/11/02/sitecore-rce/ third party advisory exploit
http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html third party advisory vdb entry

Frequently Asked Questions

What is the severity of CVE-2021-42237?
CVE-2021-42237 has been scored as a critical severity vulnerability.
How to fix CVE-2021-42237?
To fix CVE-2021-42237, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2021-42237 being actively exploited in the wild?
It is confirmed that CVE-2021-42237 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~94% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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