Popcorn Time 0.4.7 - XSS to RCE

[alestorm980]

Our security team found a security issue inside Popcorn Time 0.4.7. We have reserved the CVE-2022-25229 to refer to this issue. Attached below is the link to our responsible disclosure policy.

https://fluidattacks.com/advisories/policy

Bug description

Popcorn Time 0.4.7 has a Stored XSS in the Movies API Server(s) field via the settings page. The nodeIntegration configuration is set to on which allows the webpage to use NodeJs features, an attacker can leverage this to run OS commands.

CVSSv3 Vector:

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:N/I:H/A:N

CVSSv3 Base Score:

7.7

Steps to reproduce

1. Open the Popcorn time application.

2. Go to settings.

3. Enable Show advanced settings.

4. Scroll down to the API Server(s) section.

5. Insert the following PoC inside the Movies API Server(s) field and click on Check for updates.

a"><script>require('child_process').exec('calc');</script>

6. Scroll down to the Database section and click on Export database.

7. The application will create a .zip file with the current configuration.

8. Send the configuration to the victim.

9. The victim must go to Settings -> Database and click on Import Database

10. When the victim restarts the application the XSS will be triggered and will run the calc command.

Screenshots and files

System Information

• Version: Popcorn Time 0.4.7.
• Operating System: Windows 10.0.19042 N/A Build 19042.
• Installer: Popcorn-Time-0.4.7-win64-Setup.exe