Critical 9.0Known exploited (CISA KEV)Published Sep 3, 2025

CVE-2025-53690Sitecore Products ViewState Deserialization Vulnerability

Updated under an hour ago (2026-10-19 07:10 UTC)

Does this affect you?

It affects Sitecore Experience Manager (XM) and 5 other products. Add what you run to find out whether that includes you.

CISA lists it as known exploited since Sep 4, 2025; federal agencies had to remediate by Sep 25, 2025. Treat that date as your deadline.

Do this next

Start free and add your stack

Free account, 1 product

Every CVE for Sitecore Experience Manager (XM)

Exploited in the last 30 days

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.

CVSS: 9.0 CRITICAL (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Weakness (CWE): CWE-502
Known exploited: Added to CISA KEV Sep 4, 2025; federal remediation due Sep 25, 2025Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
EPSS (exploitation in the next 30 days): 60.60% (percentile 99)
Assigned by: Wiz
NVD analysis: Analyzed
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

Sitecore Experience Manager (XM) sitecore:experience_manager_xm (from the name)	through 9.0	CNA record
Sitecore Experience Platform (XP) sitecore:experience_platform_xp (from the name)	through 9.0	CNA record
sitecore experience_commerce sitecore:experience_commerce	through 9.0	NVD
sitecore experience_manager sitecore:experience_manager	through 9.0	NVD
sitecore experience_platform sitecore:experience_platform	through 9.0	NVD
sitecore managed_cloud sitecore:managed_cloud	all versions	NVD

References

https://cloud.google.com/blog/topics/threat-intelligence/viewstate-deserialization-zero-day-vulnerabilityexploit, third-party-advisory
https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865vendor-advisory
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690us-government-resource

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.