CVEs / CVE-2021-42237
CVE-2021-42237: Sitecore XP Remote Command Execution Vulnerability
- Known exploited in the CISA KEV catalog since 25 Mar 2022
- critical 9.8 CVSS 3.1 (NVD)
- EPSS 97.5% chance of exploitation in the next 30 days, higher than 99% of CVEs (30 Oct 2026)
- Last changed at its sources
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Summary
Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.
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.
Affected and fixed versions
| Product | Affected | Fixed in |
|---|---|---|
| n/a n/a | n/a | — |
Exploitation
| In CISA KEV since | 25 Mar 2022 |
|---|---|
| Due date for US federal agencies | 15 Apr 2022 |
| Used in ransomware campaigns | Known |
| Required action | Apply updates per vendor instructions. |
Severity
| CVSS 3.1 | 9.8 criticalCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HScored by NVD |
|---|---|
| Weakness | CWE-502 |
References
- CVE-2021-42237 on NVD
- CVE-2021-42237 in the CISA KEV catalog
- http://packetstormsecurity.com/files/164988/Sitecore-Experience-Platform-XP-Remote-Code-Execution.html Third 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=KB1000776 Vendor Advisory
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-42237 US Government Resource
Sources
Exploitation status from the CISA Known Exploited Vulnerabilities catalog. EPSS scores from FIRST. Descriptions, severity and references from the National Vulnerability Database. Open-source package versions from OSV (CC-BY 4.0). Text is shown as each source states it; Stackurity does not edit it. Check the vendor's advisory before acting.
This product uses data from the NVD API but is not endorsed or certified by the NVD.