XSS in Smoothwall Express
CVE-2019-25387
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.
Vulnerability class: XSS (Cross-Site Scripting)
EPSS: 0.002 (15.8th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.
Affected products
- Smoothwall Express — versions 3.1
- Smoothwall Smoothwall_express — versions 3.1
Weakness classification (CWE)
References
- disclosure@vulncheck.com (Exploit, VDB Entry, Third Party Advisory, exploit)
- disclosure@vulncheck.com (Product, product)
- disclosure@vulncheck.com (Broken Link, third-party-advisory)
Frequently asked questions
- What is CVE-2019-25387?
- CVE-2019-25387 is a medium-severity vulnerability in Smoothwall Express, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-02-16.
- How severe is CVE-2019-25387?
- Medium severity. CVSS v3 base score is 6.1 out of 10.