SRC-2018-0030 : Vanilla Forums domGetImages getimagesize Unserialize Remote Code Execution Vulnerability



CVSS Score:

8.1, (AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H)

Affected Vendors:


Affected Products:

Vanilla Forums

Vulnerability Details:

This vulnerability allows remote attackers to execute arbitrary code on vulnerable installations of Vanilla Forums. Authentication is not required to exploit this vulnerability.

The specific flaw exists within the domGetImages function of the ImportController class. The issue results in an unserialize via a crafted phar archive. An attacker can leverage this vulnerability to execute code under the context of the web server.

Vendor Response:

Vanilla has issued an update to correct these vulnerabilities. More details can be found at:

Disclosure Timeline:

  • 2018-08-17 - Vulnerability reported to Vanilla
  • 2018-08-23 - Vulnerability patched
  • 2018-10-02 - Uncoordinated public release of advisory


This vulnerability was discovered by Steven Seeley (mr_me) of Source Incite