CVE-2026-34819

Endian Firewall version 3.3.25 and prior allow stored cross-site scripting (XSS) via the REMARK parameter to /cgi-bin/openvpnclient.cgi. An authenticated attacker can inject arbitrary JavaScript that is stored and executed when other users view the affected page.

Score

CVSS 3.1 6.4 Medium

Status

Analyzed - disclosure@vulncheck.com

Published

2026-04-02

Last modified

2026-05-25

Weaknesses

CWE-79

Affected products

• Firewall (Endian)
• Firewall Community (Endian)

References

• https://help.endian.com/hc/en-us/sections/360004371358-Community
• https://www.vulncheck.com/advisories/endian-firewall-cgi-bin-openvpnclient-cgi-remark-stored-cross-site-scripting