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CVE-2025-53690

Sitecore Multiple Products Deserialization of Untrusted Data

9.0 CRITICALActively exploited (CISA KEV)Public exploitEPSS 51.1%
  1. Published3 Sept 2025
  2. Added to CISA KEV4 Sept 2025
  3. Remediation due25 Sept 2025
Actively exploited (CISA KEV)

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.

Added to KEV: 4 Sept 2025Federal remediation due: 25 Sept 2025

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityHigh
Privileges requiredNone
User interactionNone
ScopeChanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H

Affected products

Sitecore Experience Commerce≤ 9.0
Sitecore Experience Manager≤ 9.0
Sitecore Experience Platform≤ 9.0
Sitecore Managed Cloudall versions

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

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Frequently asked

Is CVE-2025-53690 being actively exploited?

Yes. CVE-2025-53690 is listed in the CISA Known Exploited Vulnerabilities (KEV) catalog, added 4 Sept 2025.

How severe is CVE-2025-53690?

CVE-2025-53690 has a CVSS 3.1 base score of 9.0, rated critical. EPSS estimates a 51.1% probability of exploitation.

Which products are affected by CVE-2025-53690?

Affected products include Sitecore Experience Commerce, Sitecore Experience Manager, Sitecore Experience Platform, Sitecore Managed Cloud.

How do I fix CVE-2025-53690?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2025-53690 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. Because it is on the CISA KEV list, a risk for it never ranks below high, and the update that fixes it moves to the Emergency patch lane. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.