CVE-2019-9874

Known Exploited Public Exploit

Description

Deserialization of Untrusted Data in the Sitecore.Security.AntiCSRF (aka anti CSRF) module in Sitecore CMS 7.0 to 7.2 and Sitecore XP 7.5 to 8.2 allows an unauthenticated attacker to execute arbitrary code by sending a serialized .NET object in the HTTP POST parameter __CSRFTOKEN.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
CVSS 2.0 •
EPSS 18.39% Top 10%
KEV Since 
Vendor Advisory sitecore.net
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://dev.sitecore.net/Downloads.aspx product vendor advisory
https://www.synacktiv.com/blog.html third party advisory
https://www.synacktiv.com/ressources/advisories/Sitecore_CSRF_deserialize_RCE.pdf exploit third party advisory patch

Frequently Asked Questions

What is the severity of CVE-2019-9874?
CVE-2019-9874 has been scored as a critical severity vulnerability.
How to fix CVE-2019-9874?
To fix CVE-2019-9874, 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-2019-9874 being actively exploited in the wild?
It is confirmed that CVE-2019-9874 is actively exploited. Be extra cautious if you are using vulnerable components. According to its EPSS score, there is a ~18% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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