PT-2026-29062 · Smoothwall · Smoothwall Express

Alex Williams + 1 · CVE-2026-27508 · Published 2026-03-30 · Updated 2026-03-31

Positive Technologies (AI Summary)

CVSS v3.1

6.1

Medium

Base vector

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

Name of the Vulnerable Software and Affected Versions Smoothwall Express versions prior to 3.1 Update 13

Description Smoothwall Express is affected by a reflected cross-site scripting issue. The /redirect.cgi endpoint does not properly sanitize the url parameter, allowing attackers to inject malicious JavaScript code. This can be achieved by crafting URLs with javascript: schemes, which execute arbitrary JavaScript in a victim's browser when clicked.

Recommendations Update Smoothwall Express to version 3.1 Update 13 or later.

Fix

XSS

Weakness Enumeration

CWE-79

Related Identifiers

CVE-2026-27508

Affected Products

Smoothwall Express

References · 7

• https://nvd.nist.gov/vuln/detail/CVE-2026-27508 · Security Note
• https://twitter.com/cyberbivash/status/2038683081184276793 · Twitter Post
• https://community.smoothwall.org/forum/viewtopic.php?t=45095 · Patch, Vendor Advisory
• https://twitter.com/VulmonFeeds/status/2038740822686941654 · Twitter Post
• https://vulncheck.com/advisories/smoothwall-express-reflected-xss-in-redirect-cgi-via-url-parameter · Note
• https://twitter.com/CVEnew/status/2039004519934087654 · Twitter Post
• https://twitter.com/infoflowcloud/status/2039006366480662956 · Twitter Post