CVE-2017-20261: Joomla Bargain Product VM3 SQLi Flaw

CVE-2017-20261 Overview

CVE-2017-20261 is an SQL injection vulnerability in the Joomla! Component Bargain Product VM3 1.0 extension developed by WebOrange. The flaw resides in the handling of the product_id parameter within the brainy and alice views. Unauthenticated attackers can supply crafted SQL statements through GET requests to execute arbitrary queries against the backend database. Successful exploitation enables extraction of sensitive data, including user credentials and configuration information stored in the Joomla! database. The weakness is classified under CWE-89, Improper Neutralization of Special Elements used in an SQL Command.

Critical Impact
Remote, unauthenticated attackers can extract arbitrary database contents from affected Joomla! sites by injecting SQL through the product_id GET parameter.

Affected Products

Joomla! Component Bargain Product VM3 1.0
WebOrange Bargain Product Extension for VirtueMart 3
Joomla! installations running the vulnerable extension version

Discovery Timeline

2026-06-19 - CVE-2017-20261 published to NVD
2026-06-22 - Last updated in NVD database

Technical Details for CVE-2017-20261

Vulnerability Analysis

The Bargain Product VM3 1.0 extension exposes two Joomla! views, brainy and alice, that accept a product_id query parameter. The component concatenates this parameter directly into a SQL statement without parameterization or input validation. An attacker appends SQL syntax to the parameter value and the database engine executes the injected statement as part of the original query. Because the affected endpoints do not require authentication, exploitation can be performed by any remote actor reaching the public Joomla! site.

Root Cause

The root cause is improper neutralization of user-supplied input passed to a SQL query, tracked as CWE-89. The component fails to use prepared statements or the Joomla! database API escaping functions for the product_id parameter. Input arrives via HTTP GET and is appended to the SQL string used to query product records.

Attack Vector

Attackers craft URLs targeting the vulnerable views, for example requests to index.php?option=com_bargainproduct_vm3&view=brainy&product_id=<payload> or the equivalent view=alice endpoint. The payload contains UNION-based or boolean-based SQL syntax that the database evaluates. The attack requires no privileges and no user interaction, and it is delivered entirely over the network. Public proof-of-concept code is documented in the Exploit-DB entry #42552 and the VulnCheck Joomla advisory.

No verified code example is published in this article. Refer to the linked advisories for the documented request structure.

Detection Methods for CVE-2017-20261

Indicators of Compromise

HTTP GET requests to index.php containing option=com_bargainproduct_vm3 with view=brainy or view=alice and a product_id parameter holding SQL syntax such as UNION SELECT, SLEEP(, --, or INFORMATION_SCHEMA.
Web server logs showing repeated requests to the affected views with encoded characters (%27, %20, %2C) in product_id.
Database error messages or unusually long query execution times originating from the Joomla! frontend process.

Detection Strategies

Inspect Joomla! access logs for the strings com_bargainproduct_vm3, view=brainy, and view=alice correlated with non-numeric product_id values.
Deploy WAF rules that match SQL keywords inside the product_id GET parameter for the affected component.
Enable MySQL or MariaDB general query logging on staging systems to confirm whether queries containing concatenated user input are reaching the database engine.

Monitoring Recommendations

Forward Apache, Nginx, and Joomla! application logs to a centralized log platform and alert on SQL metacharacters in extension parameters.
Track outbound database queries that reference #__users, #__session, or #__extensions tables originating from the Bargain Product VM3 component.
Baseline normal request rates to the brainy and alice views and trigger on volume spikes from a single source address.

How to Mitigate CVE-2017-20261

Immediate Actions Required

Disable or uninstall the Bargain Product VM3 1.0 extension until a fixed version is confirmed by the vendor.
Restrict public access to the brainy and alice views via web server rules or .htaccess until remediation is in place.
Rotate Joomla! administrator credentials and database account passwords if the extension has been internet-facing.
Audit the database for unauthorized user accounts and inspect Joomla! session and user tables for tampering.

Patch Information

No vendor patch URL is referenced in the NVD entry. Administrators should consult the WebOrange extension page and WebOrange security resources for an updated release. Until a fixed version is published, removal of the extension is the recommended path.

Workarounds

Add a web application firewall rule that blocks requests to option=com_bargainproduct_vm3 when product_id contains characters outside [0-9].
Enforce numeric-only validation upstream of Joomla! using a reverse proxy filter on the product_id query parameter.
Remove the component files from /components/com_bargainproduct_vm3/ and disable the entry in the Joomla! extension manager.

bash

# Example Nginx rule restricting product_id to digits for the affected component
location /index.php {
    if ($arg_option = "com_bargainproduct_vm3") {
        if ($arg_product_id !~ "^[0-9]+$") {
            return 403;
        }
    }
}