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CVE-2025-53690

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.

Actively exploited: CISA added it to its Known Exploited Vulnerabilities catalog on 4 Sept 2025.

Severity
Critical 9.0
Published
3 Sept 2025
Last changed
18 Oct 2026
Added to UpHeron
1 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
Sitecore Experience PlatformServers and applications · cpe:a:sitecore:experience_manager
  • Every version up to 9.0
Sitecore Experience PlatformServers and applications · cpe:a:sitecore:experience_platform
  • Every version up to 9.0

Known exploited

CISA name
Sitecore Multiple Products Deserialization of Untrusted Data Vulnerability
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.
Due for US agencies
25 Sept 2025
Used in ransomware
Not known

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2025-53690
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2025-53690