WordPress Subscribe To Comments 2.1.2 LFI / Code Execution

`Details  
================  
Software: Subscribe to Comments  
Version: 2.1.2  
Homepage: http://wordpress.org/plugins/subscribe-to-comments/  
Advisory report: https://security.dxw.com/advisories/admin-only-local-file-inclusion-and-arbitrary-code-execution-in-subscribe-to-comments-2-1-2/  
CVE: Awaiting assignment  
CVSS: 8 (High; AV:N/AC:L/Au:S/C:C/I:P/A:P)  
  
Description  
================  
Admin-only local file inclusion and arbitrary code execution in Subscribe to Comments 2.1.2  
  
Vulnerability  
================  
Administrators can perform Local File include attacks, which is a privilege escalation on systems where the administrator doesn’t have control over the server.  
If administrators can upload PHP files (or any file which can contain “<?php …”), they can also perform arbitrary code execution by the same method.  
  
Proof of concept  
================  
  
http://localhost/wp-admin/options-general.php?page=stc-options  
Set “Path to header” to “/etc/passwd”  
Check “Use custom style for Subscription Manager”  
“Update Options”  
https://localhost/?wp-subscription-manager=1  
  
  
Mitigations  
================  
Upgrade to version 2.3 or later  
  
Disclosure policy  
================  
dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/  
  
Please contact us on [email protected] to acknowledge this report if you received it via a third party (for example, [email protected]) as they generally cannot communicate with us on your behalf.  
  
This vulnerability will be published if we do not receive a response to this report with 14 days.  
  
Timeline  
================  
2013-08-07: Discovered  
2015-07-13: Reported to vendor by email  
2015-07-13: Requested CVE  
2015-07-14: Vendor responded confirming fixed in version 2.3  
2015-07-14: Published  
  
  
Discovered by dxw:  
================  
Tom Adams  
Please visit security.dxw.com for more information.  
  
  
  
  
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