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

phpMyFAQ Cross-Site Request Forgery (CSRF) Vulnerability (CVE-2018-16650)

SugarCRM Improper Control of Generation of Code ('Code Injection') Vulnerability (CVE-2019-17304)

WebLogic Deserialization of Untrusted Data Vulnerability (CVE-2019-16943)

Apache HTTP Server Integer Overflow or Wraparound Vulnerability (CVE-2022-22721)

SharePoint Out-of-bounds Write Vulnerability (CVE-2018-0792)

Severity

Critical

Classification

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 CWE-502 CVE-2025-27218