ACTIVELY EXPLOITED
CVE-2021-42237: Sitecore XP Remote Command Execution Vulnerability
| Vendor | Sitecore |
|---|---|
| Product | XP |
| Actively exploited | Yes |
| Added to CISA KEV | 25 Mar 2022 |
| CISA federal deadline | 15 Apr 2022 |
| Ransomware use | Known |
| Weakness (CWE) | CWE-502 |
Required action (CISA's text)
Apply updates per vendor instructions.
Description (NVD)
Sitcore XP contains an insecure deserialization vulnerability which can allow for remote code execution.
SOURCES
Other Sitecore flaws
- CVE-2025-53690: Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability
- CVE-2019-9875: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
- CVE-2019-9874: Sitecore CMS and Experience Platform (XP) Deserialization Vulnerability
Data from NVD, CISA KEV, FIRST EPSS and vendor advisories. Updated 10 Nov 2026.