Home

Description

Smoothwall Express versions prior to 3.1 Update 13 contain a stored cross-site scripting vulnerability in the /cgi-bin/vpnmain.cgi script due to improper sanitation of the VPN_IP parameter. Authenticated attackers can inject arbitrary JavaScript through VPN configuration settings that executes when the affected page is viewed by other users.

PUBLISHED Reserved 2026-02-13 | Published 2026-03-30 | Updated 2026-05-25 | Assigner VulnCheck




MEDIUM: 5.1CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

MEDIUM: 5.4CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Problem types

CWE-79 Improper neutralization of input during web page generation ('cross-site scripting')

Product status

Default status
unaffected

Any version before 3.1 Update 13
affected

Credits

Alex Williams from Pellera Technologies finder

VulnCheck coordinator

References

community.smoothwall.org/forum/viewtopic.php?t=45095 vendor-advisory patch

www.vulncheck.com/...xss-in-vpnmain-cgi-via-vpn-ip-parameter third-party-advisory

cve.org (CVE-2026-26352)

nvd.nist.gov (CVE-2026-26352)

Download JSON