What’s Vulnerable › Vulnerabilities

CVE-2025-34511: Sitecore PowerShell Extension RCE via Unrestricted Upload

• Severity: high (CVSS 8.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 30.4% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2025-06-17 · updated 2026-06-17
• Weakness: CWE-434

Description

Sitecore PowerShell Extensions, an add-on to Sitecore Experience Manager (XM) and Experience Platform (XP), through version 7.0 is vulnerable to an unrestricted file upload issue. A remote, authenticated attacker can upload arbitrary files to the server using crafted HTTP requests, resulting in remote code execution.

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/is-b-for-backdoor-pre-auth-rce-chain-in-sitecore-experience-platform/
• https://support.sitecore.com/kb?id=kb_article_view&sysparm_article=KB1003667

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