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

MySQL CVE-2017-3650 Vulnerability (CVE-2017-3650)

Oracle HTTP Server Out-of-bounds Write Vulnerability (CVE-2021-4034)

MySQL CVE-2016-0598 Vulnerability (CVE-2016-0598)

Play Framework Out-of-bounds Write Vulnerability (CVE-2020-27196)

IBM WebSEAL Incorrect Authorization Vulnerability (CVE-2023-38368)

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