ztrxwzy/joomla.3.7.0exploitProof of Concept exploit for the Joomla 3.7.0 com_fields SQL injection vulnerability (CVE-2017-8917), demonstrating detection, enumeration, and data extraction in a CTF-friendly workflow.
This repository contains a simple, CTF-friendly proof of concept (PoC) for the Joomla
com_fields SQL injection vulnerability (CVE-2017-8917). The goal is to keep the workflow
lightweight while still showing the full exploitation flow: detection, enumeration, and
data extraction.
Vulnerability: SQL injection in Joomla's com_fields component.
Root cause: The list[fullordering] parameter is not properly sanitized, allowing SQL
to be injected into the generated query. When crafted with an error-based payload (e.g.,
UpdateXML), the SQL result can be surfaced in the response, enabling data extraction.
How it is exploited (high level):
index.php?option=com_fields&view=fields&layout=modal with
the list[fullordering] parameter set to a malicious payload.UpdateXML) to force the database to echo results.<title> tag) and extract the injected output.Below are the most critical components.
parse_args()Parses CLI arguments into a simple args object with host and debug. The script
assumes HTTP on port 80 and builds the base URL from --host.
run_exploit()run_exploit() is the main orchestration function:
requests.Session() so cookies and headers persist.request_title(): Sends a request and extracts the <title> value. The PoC uses
error-based SQLi to leak data into that tag, so this is the data extraction core.build_params(): Creates the vulnerable request parameters with the injected SQL.sql_list() and dump_table() automate enumeration
and chunked extraction._fetch_token()The CSRF token is extracted from the Joomla login page. While some scenarios may not require it, many Joomla routes still enforce CSRF checks. Including it:
wrap_payload() and encode_sql_string()These helpers generate the actual injection payload:
wrap_payload() wraps a raw query in UpdateXML(...) to force error-based output.encode_sql_string() converts strings to CHAR(...) expressions to avoid quoting issues._dump_table())Rows are concatenated with a separator and fetched in substrings to avoid truncation. This keeps the output consistent even when row values are long.
python main.py --host <TARGET_IP>
Optional debug output:
python main.py --host <TARGET_IP> --debug
└─$ python exploit.py --host <TARGET>
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EXPLOIT BY ztrxwzy.
INSPIRED BY THE POC FROM Baptiste Contreras.
[888] Target : http://10.66.187.202:80/index.php
[888] CSRF token : 3ec54b1b32b5dc2dd8186537821b8dc1
[888] http://10.66.187.202:80/index.php is vulnerable to SQLi
[888] Database version detected : 5.5.64-MariaDB
[888] Current database : joomla
[888] Tables in database joomla
MIT License Copyright (c) 2025 Jesús Caldera
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The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.
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