Reflected Cross-Site Scripting Vulnerability in Storage Concentrator by StoneFly
CVE-2026-50040

5.1MEDIUM

Key Information:

Vendor

Stonefly

Status
Storage Concentrator
Storage Concentrator Virtual Machine
Vendor
CVE Published:
30 June 2026

What is CVE-2026-50040?

The Storage Concentrator (SC & SCVM) developed by StoneFly is susceptible to a reflected cross-site scripting vulnerability. This issue arises from unsanitized content being displayed on 404 error pages. An attacker can exploit this by generating a malicious URL, which, when accessed by an authenticated user, executes arbitrary scripts in the user's browser session within the context of the application. Such exploitation could result in the theft of session cookies, unauthorized redirection of users, or the execution of unintended actions on behalf of the user.

Affected Version(s)

Storage Concentrator 0 < 8.0.4.22

Storage Concentrator Virtual Machine 0 < 8.0.4.22

Storage Concentrator 8.0.4.29

References

https://www.cisa.gov/news-events/ics-advisories/icsa-26-1...
https://github.com/cisagov/CSAF/blob/develop/csaf_files/O...
https://stonefly.com/contact-us/

CVSS V4

Score:
5.1
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
Unknown

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

David Yesland of Rhino Security Labs reported this vulnerability to CISA.
.