What’s Vulnerable › Vulnerabilities

CVE-2016-9836

• Severity: critical (CVSS 9.8 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 1.9% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-12-05 · updated 2026-06-17
• Weakness: CWE-284

Description

The file scanning mechanism of JFilterInput::isFileSafe() in Joomla! CMS before 3.6.5 does not consider alternative PHP file extensions when checking uploaded files for PHP content, which enables a user to upload and execute files with the `.php6`, `.php7`, `.phtml`, and `.phpt` extensions. Additionally, JHelperMedia::canUpload() did not blacklist these file extensions as uploadable file types.

Affected products

• Joomla!: through 3.6.4

References

• http://www.securityfocus.com/bid/94663
• https://github.com/XiphosResearch/exploits/tree/master/Joomraa
• http://www.securityfocus.com/bid/94663
• https://github.com/XiphosResearch/exploits/tree/master/Joomraa

Get alerted when CVE-2016-9836 or the next vulnerability affects your stack