CVE-2025-53690
Sitecore Products ViewState Deserialization Vulnerability
Exploited in the wild. In CISA KEV since 2025‑09‑04. A vendor fix is available.
What to do
The vendor has published a fix. Version details are below where the sources state them.
What it is
From the CVE record
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.
In plain language
No plain-language summary for this CVE yet.
Exploitation
Where each signal puts this CVE on the scale from published to confirmed exploited.
- CISA KEV
Listed as exploited in the wild since 2025-09-04.
US federal agencies must remediate by 2025-09-25.
Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.
- Public exploits
No public exploit or proof of concept found in the sources we track.
- EPSS
51% chance of exploitation activity in the next 30 days, which ranks it in the 99th percentile of scored CVEs.
Exploit Prediction Scoring System, FIRST.org. A probability, not a confirmation.
Lifecycle
11 events over 355 days, from the signal feeds we watch.
- EPSS band changemoderate → highepss band change
- OpenVAS check added
- EPSS band changelow → moderate
- EPSS band changemoderate → low
- Patch availablerecord updated
- Added to CISA KEV
Affected products
- experience commerceWeb & CMS Plugins / ecommerce-platform
- experience managerWeb & CMS Plugins / cms-core
- experience platformWeb & CMS Plugins / cms-core
- managed cloudCloud & SaaS / saas-application
- Experience Manager (XM)Web & CMS Plugins / cms-core
- Experience Platform (XP)Web & CMS Plugins / cms-core
- Sitecore Experience CommerceEnterprise Software
- Sitecore Experience ManagerWeb & CMS Plugins / cms-core
And 2 more affected products. See all after sign-in
Technical detail
CVSS 3.1 vector
Open in the CVSS calculatorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H
Scored 9.0 by NVD.
How it is reached
- Attack Vector NetworkExploitable remotely over the network without any special conditions
- Attack Complexity HighRequires specific conditions like a race condition or non-default configuration
- Privileges Required NoneNo authentication required — anyone can exploit this
- User Interaction NoneNo user interaction needed — fully automated exploitation
Scope
- Scope ChangedThe exploit can affect other components (e.g. sandbox escape, host compromise from VM)
Impact if exploited
- Confidentiality HighTotal information disclosure — all data in the component is compromised
- Integrity HighTotal loss of integrity — attacker can modify any data in the component
- Availability HighTotal denial of service — the component is completely unavailable
Weaknesses
ATT&CK techniques
Mapped from the weaknesses above (CWE to ATT&CK), not observed in attacks.
Sources
References in the record
- cloud.google.com/blog/topics/threat-intelligence/viewstate-deserialization-zero-day-vulnerability
- support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003865
- cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2025-53690
And 2 more references. See all after sign-in
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