CVE-2025-34511

HIGH 8.8

Sitecore PowerShell Extension RCE via Unrestricted Upload

CVSS Score

8.8

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-434
Vendor	sitecore
Product	powershell extension
Published	Jun 17, 2025
Last Updated	Feb 26, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

Affected Versions

Sitecore / Powershell Extension

0 ≤ 7.0

References

NVD ↗ CVE.org ↗ EPSS Data ↗

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

Credits

Piotr Bazydlo of watchTowr