CVE-2026-34813

5.1 mediumEPSS 0.2%

Medium (5.1) in endian firewall community. EPSS 0.2% chance of exploitation in the next 30 days.

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

Severity

CVSS 4.0

5.1 medium

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

CVSS 3.1

5.4 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 7% of CVEs (scores of 2026-10-31)
CWE: CWE-79
Published: 2026-04-02
Modified: 2026-07-24
Record from: the NVD, synced 2026-10-19

Affected

endian:firewall_community

References

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

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