CVE-2026-27508CWE-79

Smoothwall Express < 3.1 Update 13 Reflected XSS in redirect.cgi via url Parameter

Medium · published March 30, 2026

CVSS v4.0
5.1
EPSS
0%
Percentile
17.5
In the wild
Unconfirmed
What it is

Smoothwall Express versions prior to 3.1 Update 13 contain a reflected cross-site scripting vulnerability in the /redirect.cgi endpoint due to improper sanitation of the url parameter. Attackers can craft malicious URLs with javascript: schemes that execute arbitrary JavaScript in victims' browsers when clicked through the unsanitized link.

The record
Technical detail
CVSS v4.0
5.1 · MEDIUM
Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
EPSS
0.00266 · 17.5th percentile
Weakness
CWE-79 · Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
Published
2026-03-30T16:51Z
EPSS history
Timeline
  • 30 MAR 16:51Z
    Smoothwall Express < 3.1 Update 13 Reflected XSS in redirect.cgi via url Parameter
    cvelistv5