Description

Due to the insecure BinaryFormatter deserialization vulnerability in Sitecore XM/XP, an unauthenticated attacker might send a specially-crafted serialized request to execute arbitrary code on the system.

Remediation

Upgrade to the latest version of Sitecore

References

Sitecore Unsafe Deserialization - CVE-2025-27218

Sitecore Security Advisory - KB1003535

Related Vulnerabilities

Oracle Database Server Cryptographic Issues Vulnerability (CVE-2006-0270)

Apache HTTP Server CVE-2018-1283 Vulnerability (CVE-2018-1283)

XWiki Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') Vulnerability (CVE-2022-24897)

Oracle Database Server Other Vulnerability (CVE-2005-3440)

Oracle Application Server CVE-2008-2593 Vulnerability (CVE-2008-2593)

Severity

Critical

Classification

CVE-2025-27218 CWE-502 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L

Tags

Insecure Deserialization Known Vulnerabilities Code Execution