CVE-2021-42237

9.8 CRITICAL CISA KEV - Actively Exploited
Published: November 05, 2021 Modified: November 10, 2025
View on NVD

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.

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CVSS v3.x Details

0.0 Low Medium High Critical 10.0
Vector String
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

References to Advisories, Solutions, and Tools

Patch Vendor Advisory Exploit Third Party Advisory
http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html
Source: cve@mitre.org
Third Party Advisory VDB Entry
http://sitecore.com
Source: cve@mitre.org
Vendor Advisory
https://blog.assetnote.io/2021/11/02/sitecore-rce/
Source: cve@mitre.org
Exploit Third Party Advisory
https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776
Source: cve@mitre.org
Vendor Advisory
http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html
Source: af854a3a-2127-422b-91ae-364da2661108
Third Party Advisory VDB Entry
http://sitecore.com
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://blog.assetnote.io/2021/11/02/sitecore-rce/
Source: af854a3a-2127-422b-91ae-364da2661108
Exploit Third Party Advisory
https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1000776
Source: af854a3a-2127-422b-91ae-364da2661108
Vendor Advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237
Source: 134c704f-9b21-4f2e-91b3-4a467353bcc0
US Government Resource

9 reference(s) from NVD

Quick Stats

CVSS v3 Score
9.8 / 10.0
EPSS (Exploit Probability)
94.3%
100th percentile
Exploitation Status
Actively Exploited
Remediation due: 2022-04-15

Weaknesses (CWE)

CWE-502 CWE-502

Affected Vendors

sitecore

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