Unrestricted file upload vulnerability in uploadScript.php in InfiniteWP Admin Panel before 2.4.4, when the allWPFiles query parameter is set, allows remote attackers to execute arbitrary code by uploading a file with a double extension, then accessing it via a direct request to the file in the uploads directory, as demonstrated by the .php.swp filename.

References

• https://nvd.nist.gov/vuln/detail/CVE-2014-9521
• http://seclists.org/fulldisclosure/2014/Dec/43
• https://lifeforms.nl/20141210/infinitewp-vulnerabilities