CVE-2026-27508 MEDIUM

CVE-2026-27508: Smoothwall Express < 3.1 Update 13 Reflected XSS in redirect.cgi via url Parameter

Vendor Smoothwall
Product Express
Weakness CWE-79 · XSS
Published March 30, 2026
Last update May 25, 2026
View on NVD All CVEs

CVSS base score

5.1/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction —
Confidentiality —
Integrity —

CVSS 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

What the vulnerability does

01Description

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.

Key dates

02Disclosure timeline

March 30, 2026 CVE published
May 25, 2026 Record updated