PatchTheCVECVE-2011-4106: TimThumb (timthumb.php) before 2.0 does not validate the entire source with the domain white list, which allow
CVE-2011-4106 is a medium-severity flaw (CVSS 6.8) affecting timthumb. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
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.
Why this priority
- EPSS top 2%: very likely to be exploited
- Public exploit reference
A fixed release or distro patch exists.
Risk facts
| CVSS score | 6.8 (Medium) |
| EPSS exploit chance | 23.3% (top 2%) |
| CISA exploited list | No |
| Weakness | CWE-20 |
| Published | 2013-10-26 |
| Last modified | 2026-06-16 |
Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Public exploits and detection
Public code exists for this CVE. Treat unpatched systems as at risk, and only run PoCs in a lab.
- Exploit-DB: Multiple WordPress Plugins - 'timthumb.php' File Upload
- Exploit-DB: WordPress Plugin TimThumb 1.32 - Remote Code Execution
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2011-4106?
timthumb: upgrade to newer than 1.99. Exact commands for each OS are on this page.
Is CVE-2011-4106 being exploited?
CVE-2011-4106 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2011-4106 affect?
CVE-2011-4106 affects timthumb. Severity is medium (CVSS 6.8). 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 acce
How urgent is CVE-2011-4106?
Priority 53/100. EPSS top 2%: very likely to be exploited; Public exploit reference
Software pages
Related CVEs
- CVE-2014-4663 MEDIUM 6.8 DOWNGRADE DOWNGRADE TimThumb 2.8.13 and WordThumb 1.07, when Webshot (aka Webshots) is enabled, allows remote attackers to execute
- CVE-2010-5303 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in the displayError function in timthumb.php in TimThumb before 1.15
- CVE-2010-5302 MEDIUM 4.3 UPGRADE Cross-site scripting (XSS) vulnerability in timthumb.php in TimThumb before 1.15 as of 20100908 (r88), as used
- CVE-2009-5142 MEDIUM 4.3 UPGRADE DOWNGRADE Cross-site scripting (XSS) vulnerability in timthumb.php in TimThumb 1.09 and earlier, as used in Mimbo Pro 2.