What’s Vulnerable › Vulnerabilities

CVE-2025-53691: Sitecore Experience Remote Code Execution through Insecure Deserialization

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.6% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-09-03 · updated 2026-10-18
• Weakness: CWE-502

Description

Deserialization of Untrusted Data vulnerability in Sitecore Experience Manager (XM), Sitecore Experience Platform (XP) allows Remote Code Execution (RCE).This issue affects Experience Manager (XM): from 9.0 through 9.3, from 10.0 through 10.4; Experience Platform (XP): from 9.0 through 9.3, from 10.0 through 10.4.

Affected products

• Sitecore Experience Commerce: from 9.0 through 10.4
• Sitecore Experience Manager: from 9.0 through 10.4
• Sitecore Experience Platform: from 9.0 before 10.4; 10.4 — fixed in 10.4
• Sitecore Managed Cloud: all versions

How to fix

Upgrade to a fixed version: Sitecore Experience Platform 10.4. Check the vendor advisory for mitigations.

References

• https://labs.watchtowr.com/cache-me-if-you-can-sitecore-experience-platform-cache-poisoning-to-rce/
• https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003667

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