Arbitrary file upload in Sitecore Powershell Extension
CVE-2025-34511
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…
Vulnerability class: Unrestricted File Upload
EPSS: 0.858 (99.4th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.
Affected products
- Sitecore Powershell Extension — versions 0
Weakness classification (CWE)
Public proof-of-concept exploits
References
- labs.watchtowr.com/is-b-for-backdoor-pre-auth-rce-chain-in-sitecore-experience-… (third-party-advisory, exploit, technical-description)
- support.sitecore.com/kb (vendor-advisory)
Frequently asked questions
- What is CVE-2025-34511?
- CVE-2025-34511 is a high-severity vulnerability in Sitecore Powershell Extension, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2025-06-17.
- How severe is CVE-2025-34511?
- High severity. CVSS v3 base score is 8.8 out of 10.
- Is CVE-2025-34511 known to be exploited?
- 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.