blue0x1/FoF-Pretty-Mail-LFI-Exploit-for-Flarum

proof-of-concept exploit for a Local File Inclusion (LFI) vulnerability found in the FoF Pretty Mail extension (version 1.1.2) for Flarum forums. The vulnerability allows an attacker with administrative access to include sensitive files from the server's file system in email content.

FoF Pretty Mail LFI Exploit for Flarum

proof-of-concept exploit for a Local File Inclusion (LFI) vulnerability found in the FoF Pretty Mail extension (version 1.1.2) for Flarum forums. The vulnerability allows an attacker with administrative access to include sensitive files from the server's file system in email content.

Exploit Details

Exploit Title: FoF Pretty Mail 1.1.2 Extension for Flarum Local File Inclusion (LFI)
Date: 03/28/2024
Exploit Author: Chokri Hammedi
Vendor Homepage: https://flarum.org/
Software Link: https://github.com/FriendsOfFlarum/pretty-mail
Version: 1.1.2
Tested on: Windows XP
CVE: N/A

Description

The FoF Pretty Mail extension for Flarum is vulnerable to Local File Inclusion (LFI) due to the unsafe handling of file paths in the email template. An attacker with administrative access can exploit this vulnerability to include sensitive files from the server's file system in the email content, potentially leading to information disclosure. Steps to Reproduce

1. Log in as an administrator on the Flarum forum.
2. Navigate to the FoF Pretty Mail extension settings.
3. Edit the email default template and insert the following payload at the end of the template:

    {{ include('/proc/version') }}

4. Save the changes to the email template.
5. Trigger any action that sends an email, such as user registration or password reset. The recipient of the email will see the contents of the included file (in this case, /proc/version) in the email content.

POC:
injecting the payload in the default mail template,
payload:

    {{ include('/proc/version') }}

trigger reset passsword action ( or any action ) to receive email

Viewing the received email

Disclaimer

This exploit is provided for educational and research purposes only. Use of this exploit for malicious purposes is strictly prohibited. Always ensure you have proper authorization before testing any system for vulnerabilities.