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

XWiki Missing Authorization Vulnerability (CVE-2022-36091)

TYPO3 Improper Input Validation Vulnerability (CVE-2010-5099)

Oracle JRE CVE-2013-5840 Vulnerability (CVE-2013-5840)

XWiki Improper Authentication Vulnerability (CVE-2022-36093)

WebERP Incorrect Permission Assignment for Critical Resource Vulnerability (CVE-2018-20420)

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