How to fix CVE-2019-25388?

Within 30 days: Identify affected systems and apply vendor patches as part of regular patch cycle. Verify Content-Security-Policy and output encoding.

Is Smoothwall Express affected by CVE-2019-25388?

Organizations using Smoothwall Express 3.1-SP4-polar-x86_64-update9 should be aware of moderate risk from CVE-2019-25388, a cross-site scripting vulnerability rated CVSS 6.1. Attackers could inject scripts to steal sessions or perform actions as authenticated users.

CVE-2019-25388

MEDIUM

2026-02-16 [email protected]

6.1

CVSS 3.1

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Changed

Confidentiality

Low

Integrity

Low

Availability

None

Lifecycle Timeline

Analysis Generated

Mar 12, 2026 - 21:54 vuln.today

PoC Detected

Feb 20, 2026 - 16:27 vuln.today

Public exploit code

CVE Published

Feb 16, 2026 - 18:19 nvd

MEDIUM 6.1

Description

Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted input to the ipblock.cgi endpoint. Attackers can inject script tags through the SRC_IP and COMMENT parameters in POST requests to execute arbitrary JavaScript in users' browsers.

Analysis

Technical Context

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects the SRC_IP and COMMENT component of Smoothwall Express. Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted input to the ipblock.cgi endpoint. Attackers can inject script tags through the SRC_IP and COMMENT parameters in POST requests to execute arbitrary JavaScript in users' browsers.

Affected Products

Vendor: Smoothwall. Product: Smoothwall Express. Versions: up to 3.1. Component: SRC_IP and COMMENT.

Remediation

Monitor vendor advisories for a patch. Implement output encoding and Content Security Policy headers. Restrict network access to the affected service where possible.

Priority Score

Low Medium High Critical

KEV: 0

EPSS: +0.1

CVSS: +30

POC: +20

CVE-2019-25388 vulnerability details – vuln.today

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CVE-2019-25388

CVSS Vector

Lifecycle Timeline

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CVE-2019-25388

CVSS Vector

Lifecycle Timeline

Tags

Description

Analysis

Technical Context

Affected Products

Remediation

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External POC / Exploit Code