Stored XSS in the VPN logs monitor

Advisory ID CVE Number Date discovered Severity Advisory revision
STORM-2026-030 CVE-2026-111088 09/30/2026 high v1

Vulnerability details

A Stored Cross-Site Scripting vulnerability exists in the SNS VPN log monitoring screen.

Impacted products

ProductsSeverityDetail
Stormshield Network Security high SNS is impacted.

Revisions

Version Date Description
v1 10/16/2026 Initial release


Stormshield Network Security

CVSS v3.1 Overall Score: 7.5      

Analysis

Impacted version

In some cases, the SSL VPN monitoring component does not sanitize some log fields.

 
  • SNS 5.1.0 to 5.1.3
  • SNS 5.0.0 to 5.0.9
  • SNS 4.8.0 to 4.8.19
  • SNS 4.3.0 to 4.3.44

 

Workaround solution

Solution

There is no workaround solution.

The following updates will fix this vulnerability:

  • SNS 5.1.4 EA
  • SNS 5.0.10
  • SNS 4.8.20 LTSB

 



Attack Vector Attack Complexity Privileges Required User Interaction Scope Confidentiality Impact Integrity Impact Availability impact
Network Low Low None Unchanged High None None
CVSS Base score: 6.5 CVSS Vector: (AV:N/AC:L/PR:L/UI:N/S:U/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:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C)
Confidentiality Requirement (CR) Integrity Requirement (IR) Availability Requirement (AR)
High Low Low
CVSS Environmental score: 7.5 CVSS Vector: (AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:P/RL:O/RC:C/CR:H/IR:L/AR:L/MAV:X/MAC:X/MPR:X/MUI:X/MS:X/MC:X/MI:X/MA:X)