CVE-2017-20258: Joomla! RPC Responsive Portfolio SQL Injection Vulnerability (CVSS 8.2)

Technical summary

The vulnerability exists in the RPC Responsive Portfolio component for Joomla! version 1.6.1. The component fails to properly sanitize or parameterize the 'id' parameter when processing portfolio view requests. An attacker can exploit this by sending a GET request to index.php with option=com_pofos&view=pofo&id=[malicious SQL], causing the application to execute arbitrary SQL queries against the backend database. The flaw permits unauthenticated access, meaning no login is required. The CVSS 3.1 score of 8.2 (HIGH) reflects high confidentiality impact with low attack complexity and no privilege escalation requirement.

Business impact

Successful exploitation can lead to unauthorized access to sensitive business data including customer personal information, transaction records, user credentials, and internal application secrets. For organizations running Joomla! with this component, a data breach could result in compliance violations (GDPR, HIPAA, PCI-DSS depending on data types), reputational harm, customer notification costs, and potential regulatory fines. The attack requires no authentication or social engineering, making it a trivial entry point for opportunistic threat actors.

Affected systems

Only Joomla! installations running the RPC Responsive Portfolio component version 1.6.1 are confirmed affected. The vulnerability requires the component to be installed and accessible via web requests. Organizations using alternative portfolio or gallery components are not affected by this specific flaw. Verify your environment by checking the component version in Joomla!'s Extension Manager.

Exploitability

This vulnerability has a low barrier to exploitation. An attacker needs only network access to the Joomla! installation and basic knowledge of SQL injection syntax. No authentication, user interaction, or specialized tools are required. The GET-based attack vector means the malicious request can be delivered via a simple URL or automated scanner. The attack is highly repeatable and detectable only through traffic inspection or database query logging. Given the straightforward nature of SQL injection attacks and the public availability of exploitation techniques, this flaw represents an immediate risk in exposed installations.

Remediation

The primary remediation is to remove or disable the RPC Responsive Portfolio component if it is not essential to operations. If the component must remain in use, verify against the vendor advisory whether a patched version (1.6.2 or later) is available and apply it immediately after testing in a non-production environment. As a temporary mitigation, restrict web access to the Joomla! installation using a Web Application Firewall (WAF) rule that blocks requests containing SQL keywords in the 'id' parameter. Additionally, implement database access controls to limit query scope and enable database query auditing.

Patch guidance

Check the vendor (RPC/Joomla! component publisher) advisory for an available patch version addressing this SQL injection. Verify the specific patched version number against official release notes before deployment. Test the patch thoroughly in a staging environment to confirm compatibility with your Joomla! version and other installed extensions. Apply patches during a maintenance window with backups in place. If no patch is available from the vendor, consider migrating to an alternative, actively-maintained portfolio component or disable the feature entirely.

Detection guidance

Monitor web server access logs and WAF logs for GET requests to index.php containing the pattern option=com_pofos&view=pofo&id= followed by SQL keywords (SELECT, UNION, DROP, INSERT, etc.). Enable Joomla! database query logging to capture any anomalous SQL statements. Intrusion detection systems (IDS) should flag SQL injection payloads in HTTP parameters. Look for failed or error-based SQL queries in database logs, which may indicate exploitation attempts. Correlate web access anomalies with database activity spikes to identify active exploitation.

Why prioritize this

This vulnerability should be prioritized as CRITICAL if your organization runs Joomla! with RPC Responsive Portfolio 1.6.1. The HIGH CVSS score (8.2), combined with unauthenticated remote exploitability, zero user interaction requirement, and direct database access potential, creates an unacceptable risk posture. SQL injection flaws remain among the most actively exploited web vulnerabilities. An exposed instance is likely to be compromised within days by automated scanners.

Risk score, explained

The CVSS 3.1 score of 8.2 (HIGH severity) reflects: Network Attack Vector (attacker can exploit remotely), Low Attack Complexity (no special conditions required), No Privilege Required (unauthenticated), No User Interaction, Unchanged Scope, High Confidentiality Impact (sensitive data exposure), and Low Integrity Impact (database modification possible but not the primary threat). The score does not account for Availability impact, as the flaw does not inherently cause denial of service. The severity is driven by the direct, unauthenticated path to unauthorized data access.

Frequently asked questions