Sitecore - Arbitrary File Upload (CVE-2025-34511)
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.
psychologyCrowdSec Analysis
CVE-2025-34511 is a critical vulnerability in the Sitecore PowerShell Extensions plugin. It allows remote, unauthenticated attackers to upload arbitrary files to the server, potentially leading to remote code execution.
CrowdSec has been tracking this vulnerability and its exploits since 20th of June 2025.
CrowdSec network data shows that most actors exploiting CVE-2025-34511 rely on broad, untargeted scans with minimal filtering. The activity is largely automated and opportunistic in nature. CrowdSec data also reveals a clear uptick in attacks involving CVE-2025-34511 over the past week. Activity is above the usual baseline, suggesting growing attention from attackers. This may reflect rising awareness, recent exploit releases, or expanded targeting efforts.
Attackers exploit this vulnerability by sending crafted POST requests with malicious payloads to the powershelluploadfile2.aspx endpoint, located at /sitecore%20modules/shell/powershell/uploadfile.
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| Event | Date |
|---|---|
| CVE Published | 2025-06-17 |
| Rule Released | 2025-06-20 |
| CrowdSec First Seen | 2025-09-20 |