This security bulletin contains one medium risk vulnerability.
Exploit availability: NoDescription
The vulnerability allows a remote attacker to execute arbitrary PHP code on the target system.
The vulnerability exists due to insufficient validation of user-supplied data when uploading files via "Assets->Upload files" screen. A remote authenticated attacker can upload .jpg file with PHP code inside, then use the "Replace it" option to rename the file and add .php extension to it. As a result the uploaded PHP code will be executed on the server.
Install update from vendor's repository.
Craft CMS: 2.6.3000External links
Q & A
Can this vulnerability be exploited remotely?
Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.
Is there known malware, which exploits this vulnerability?
No. We are not aware of malware exploiting this vulnerability.