Critical severity · published Dec 5, 2016
CVE-2016-9836
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…
9.8
CVSS
1.9%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
High
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.9% · higher than 79% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
JO
Joomla · Joomla
through 3.6.4 · source: NVD
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2016-9836
CVE.org
https://www.cve.org/CVERecord?id=CVE-2016-9836
Third Party Advisory
http://www.securityfocus.com/bid/94663
Exploit
https://github.com/XiphosResearch/exploits/tree/master/Joomraa
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