Possible DOM XSS in SNS Web Administration Portal

Advisory ID CVE Number Date discovered Severity Advisory revision
STORM-2026-022 08/06/2026 medium v1

Vulnerability details

A vulnerability  has been identified in Stormshield’s web administration panel, affecting SNS appliances.

Impacted products

ProductsSeverityDetail
Stormshield Network Security medium SNS is impacted

Revisions

Version Date Description
v1 10/16/2026 Initial release


Stormshield Network Security

CVSS v3.1 Overall Score: 5.9      

Analysis

Impacted version

It is possible to execute a DOM-based Cross-Site Scripting attack against Stormshield’s web administration panel.

To exploit this vulnerability, an attacker would need to craft a URL containing a malicious script payload within a specific parameter and lure an authenticated administrator into visiting that link.
  • SNS 5.1.0 to 5.1.3
  • SNS 5.0.0 to 5.0.9

Workaround solution

Solution

There is no workaround solution.

The following updates will fix this vulnerability:

  • SNS 5.1.4 EA
  • SNS 5.0.10


Attack Vector Attack Complexity Privileges Required User Interaction Scope Confidentiality Impact Integrity Impact Availability impact
Adjacent Network Low None Required Changed High None None
CVSS Base score: 6.6 CVSS Vector: (AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N)
Exploit Code Maturity Remediation Level Report Confidence
Proof of concept code Official fix Confirmed
CVSS Temporal score: 5.9 CVSS Vector: (AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C)
Confidentiality Requirement (CR) Integrity Requirement (IR) Availability Requirement (AR)
Medium Medium Medium
CVSS Environmental score: 5.9 CVSS Vector: (AV:A/AC:L/PR:N/UI:R/S:C/C:H/I:N/A:N/E:P/RL:O/RC:C/CR:M/IR:M/AR:M/MAV:X/MAC:X/MPR:X/MUI:X/MS:X/MC:X/MI:X/MA:X)


Acknowledgements

We acknowledge the researcher kto94 for discovering this vulnerability.