---
title: "CVE-2006-6421\n    | Ubuntu"
description: Ubuntu is an open source software operating system that runs from the
  desktop, to the cloud, to all your internet connected things.
url: https://ubuntu.com/security/CVE-2006-6421?format=md
keywords: index, follow
---

# CVE-2006-6421

Publication date 10 December 2006

Last updated 17 July 2025

---

Ubuntu priority

**Medium**

[Why this priority?](https://ubuntu.com/security/cves/about#priority )

Toggle side navigation

## Description

Cross-site scripting (XSS) vulnerability in the private message box
implementation (privmsg.php) in phpBB 2.0.x allows remote authenticated
users to inject arbitrary web script or HTML via the "Message body" field
in a message to a non-existent user.

## Status

Show unmaintained releases

| Package | Ubuntu Release | Status |
| --- | --- | --- |
| phpbb2 | 9.10 karmic | Not in release |
| 9.04 jaunty | Not in release |
| 8.10 intrepid | Fixed 2.0.21-6 |
| 8.04 LTS hardy | Fixed 2.0.21-6 |
| 7.10 gutsy | Fixed 2.0.21-6 |
| 7.04 feisty | Fixed 2.0.21-6 |
| 6.10 edgy | Ignored end of life, was needed |
| 6.06 LTS dapper | Ignored end of life |

---

* [How can I get the fixes?](https://ubuntu.com/security/cves/about#security)
* [What do statuses mean?](https://ubuntu.com/security/cves/about#statuses)

## References

* [MITRE](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-6421)
* [NVD](https://nvd.nist.gov/vuln/detail/CVE-2006-6421)
* [Launchpad](https://launchpad.net/bugs/cve/CVE-2006-6421)
* [Debian](https://security-tracker.debian.org/tracker/CVE-2006-6421)

### Other references

* <https://www.cve.org/CVERecord?id=CVE-2006-6421>