CVE-2025-53690

Sitecore Experience Manager (XM), Sitecore Experience Platform (XP)

Published 3 Sept 2025 · updated 17 Jun 2026 · Analyzed

9.0 Critical · CVSS 3.1, CNA

Exploited in the wild

CISA added this to its Known Exploited Vulnerabilities catalog on 4 Sept 2025, with a remediation deadline of 25 Sept 2025 for US federal agencies.

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

Description

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Code Injection.This issue affects Experience Manager (XM): through 9.0; Experience Platform (XP): through 9.0.

References

cloud.google.com/blog/topics/threat-intelligence/viewstate-deserialization-zero-day-vulnerability · Exploit, Third Party Advisory
support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865 · Vendor Advisory
www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690 · US Government Resource