Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability

CVE-2025-53690

Action was due by: 9/25/2025

CISA Known Exploited Vulnerability

This vulnerability is part of CISA's Known Exploited Vulnerabilities (KEV) catalog, indicating active exploitation in the wild.

Overview

Sitecore Experience Manager (XM), Experience Platform (XP), Experience Commerce (XC), and Managed Cloud contain a deserialization of untrusted data vulnerability involving the use of default machine keys. This flaw allows attackers to exploit exposed ASP.NET machine keys to achieve remote code execution.

Vendor

Sitecore

Product

Multiple Products

Affected Versions

See vendor advisory

Technical Description

This vulnerability was identified in Multiple Products by Sitecore. Sitecore Experience Manager (XM), Experience Platform (XP), Experience Commerce (XC), and Managed Cloud contain a deserialization of untrusted data vulnerability involving the use of default machine keys. This flaw allows attackers to exploit exposed ASP.NET machine keys to achieve remote code execution.

Exploitability

Medium - Publicly disclosed

Impact

Complete system compromise possible

Additional Notes

https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 ; https://nvd.nist.gov/vuln/detail/CVE-2025-53690

Required Action (CISA)

Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Due Date: 9/25/2025

References

https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2025-53690

https://nvd.nist.gov/vuln/detail/CVE-2025-53690

https://www.cisa.gov/known-exploited-vulnerabilities-catalog