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A penetration testing tool for finding file upload bugs (NDSS 2020)

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FUSE is a penetration testing system designed to identify Unrestricted Executable File Upload (UEFU) vulnerabilities. The details of the testing strategy is in our paper, "FUSE: Finding File Upload Bugs via Penetration Testing", which appeared in NDSS 2020. To see how to configure and execute FUSE, see the followings.



FUSE currently works on Ubuntu 18.04 and Python 2.7.15.

  1. Install dependencies
# apt-get install rabbitmq-server
# apt-get install python-pip
# apt-get install git
  1. Clone and build FUSE
$ git clone
$ cd FUSE && pip install -r requirements.txt
  • If you plan to leverage headless browser verification using selenium, please install Chrome and Firefox web driver by refering selenium document.



  • FUSE uses a user-provided configuration file that specifies parameters for a target PHP application. The script must be filled out before testing a target Web application. You can check out README file and example configuration files.

  • Configuration for File Monitor (Optional)

$ vim

 10 MONITOR_PATH='/var/www/html/' <- Web root of the target application
 11 MONITOR_PORT=20174            <- Default port of File Monitor
 12 EVENT_LIST_LIMITATION=8000    <- Maxium number of elements in EVENT_LIST


  • FUSE
$ python [Path of configuration file]
  • File Monitor
$ python
  • Result
    • When FUSE completes the penetration testing, a [HOST] directory and a [HOST_report.txt] file are created.
    • A [HOST] folder stores files that have been attempted to upload.
    • A [HOST_report.txt] file contains test results and information related to files that trigger U(E)FU.


If you find UFU and UEFU bugs and get CVEs by running FUSE, please send a PR for

Application CVEs
Elgg CVE-2018-19172
ECCube3 CVE-2018-18637
CMSMadeSimple CVE-2018-19419, CVE-2018-18574
CMSimple CVE-2018-19062
Concrete5 CVE-2018-19146
GetSimpleCMS CVE-2018-19420, CVE-2018-19421
Subrion CVE-2018-19422
OsCommerce2 CVE-2018-18572, CVE-2018-18964, CVE-2018-18965, CVE-2018-18966
Monstra CVE-2018-6383, CVE-2018-18694
XE XEVE-2019-001


This research project has been conducted by WSP Lab at KAIST.

Citing FUSE

To cite our paper:

    author = {Taekjin Lee and Seongil Wi and Suyoung Lee and Sooel Son},
    title = {{FUSE}: Finding File Upload Bugs via Penetration Testing},
    booktitle = {Proceedings of the Network and Distributed System Security Symposium},
    year = 2020