What is the CVSS score of CVE-2019-25387?

CVE-2019-25387 has a CVSS 3.1 base score of 6.1 (Medium). CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N. EPSS exploitation probability: 0.1%.

Which versions of Smoothwall Express are affected by CVE-2019-25387?

Organizations using Smoothwall Express 3.1-SP4-polar-x86_64-update9 should be aware of moderate risk from CVE-2019-25387, a cross-site scripting vulnerability rated CVSS 6.1.

Is there a public PoC exploit available for CVE-2019-25387?

Yes, a public proof-of-concept exploit is available for CVE-2019-25387. Prioritise patching immediately. EPSS: 0.1%.

How to fix or mitigate CVE-2019-25387?

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

Smoothwall Express CVE-2019-25387

MEDIUM

Cross-site Scripting (XSS) (CWE-79)

2026-02-16 disclosure@vulncheck.com

XSS Smoothwall Express Smoothwall

6.1

CVSS 3.1 · NVD

Severity by source

NVD PRIMARY

6.1 MEDIUM

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

Primary rating from NVD · only source for this CVE.

CVSS VectorNVD

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 - 16:26 vuln.today

Public exploit code

CVE Published

Feb 16, 2026 - 18:19 nvd

MEDIUM 6.1

DescriptionCVE.org

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 xtaccess.cgi endpoint. Attackers can inject script payloads through the EXT, DEST_PORT, or COMMENT parameters via POST requests to execute arbitrary JavaScript in victim browsers.

AnalysisAI

Technical ContextAI

Classified as CWE-79 (Cross-site Scripting (XSS)). Affects 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 xtaccess.cgi endpoint. Attackers can inject script payloads through the EXT, DEST_PORT, or COMMENT parameters via POST requests to execute arbitrary JavaScript in victim browsers.

RemediationAI

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