Expert Joomla Security Audit: Full Analysis and Remediation

A Joomla site can suddenly stop working due to a vulnerability. Or you are about to launch a project and want to ensure it is protected from hacking. Joomla is one of the most popular CMS, but its extensions and custom components often contain vulnerabilities. According to OWASP, about 70% of vulnerabilities come from third-party extensions. A client recently approached us with a complaint about slow site performance — it turned out that a custom component had an SQL injection through which attackers were exfiltrating the database. After the audit, we closed 12 vulnerabilities, and the site became three times faster. Our security audit identifies problems before attackers exploit them. Over the years, we have audited more than 50 projects, and typical issues repeat: SQL injections in custom queries, XSS in forms, outdated PHP versions (e.g., 5.x), permissions set to 777, and missing security headers. We combine automated scanners and manual code review to miss no vulnerability. On average, each project contains 5–10 vulnerabilities, half of which are critical. Preventing a single data leak can save millions in reputation recovery and fines.

Typical Vulnerabilities

We most often find SQL injections in custom components, XSS in extensions, outdated core versions, incorrect permissions, weak server configuration, and lack of two-factor authentication. Each of these issues can lead to full site compromise. For example, in one project we discovered a vulnerability that allowed attackers to access the user database in just two hours. After closing the risk, the client avoided a personal data breach.

How We Conduct the Audit

We combine automated scanning and expert analysis. Automated scanners provide a baseline, while manual code review finds logical errors that no scanner catches.

Automated Scanning

# Joomscan — specialized scanner perl joomscan.pl -u https://target.example # OWASP ZAP passive scanning zap-cli quick-scan --self-contained --spider https://target.example 

These tools check known vulnerabilities in the core and popular extensions, test security headers, and identify weak spots in configuration.

Configuration Check

// configuration.php — mandatory parameters public $debug = '0'; public $error_reporting = 'none'; public $force_ssl = '2'; public $cookie_httponly = '1'; public $cookie_secure = '1'; public $lifetime = '15'; public $session_handler = 'database'; 

We also check permissions:

find /var/www/html -type f -name "*.php" -perm /o+w find /var/www/html/images -name "*.php" 

The presence of PHP files in the uploads folder is a clear sign of compromise.

HTTP Header Analysis

add_header X-Content-Type-Options "nosniff"; add_header X-Frame-Options "SAMEORIGIN"; add_header Content-Security-Policy "default-src 'self'; script-src 'self' 'unsafe-inline'; style-src 'self' 'unsafe-inline'"; add_header Strict-Transport-Security "max-age=31536000; includeSubDomains"; 

These headers are mandatory to protect against XSS, clickjacking, and traffic interception.

Custom Code Review

# SQL Injection in custom components grep -r "\$_GET\|\$_POST\|\$_REQUEST" administrator/components/com_custom/ grep -r "->query\|->loadResult" administrator/components/com_custom/ | grep -v "quoteName\|quote(" 

Why Manual Code Review Matters

Automated scanners are excellent at finding known vulnerabilities but often miss business logic flaws — for example, insufficient access control in custom components or incorrect session handling. Manual code review reveals 2–3 times more issues, making our audit significantly deeper than standard scanning. Only this approach can guarantee your site is protected against all modern threats.

How Often Should You Conduct a Security Audit?

We recommend a full audit at least once every six months, as well as after every major core update or installation of a new extension. If the site processes sensitive data (e.g., payment information), frequency can increase to quarterly checks. Regular auditing catches vulnerabilities early and avoids costly incidents.

What to Do After Receiving the Report?

After the audit, you receive a detailed document describing each vulnerability, its severity, and step-by-step remediation instructions. We also offer a turnkey service — our engineers fix all issues within 1–3 days. After remediation, we run a rescan to confirm security.

Our Work Process

1. Analysis — gather information about the site, versions, extensions.
2. Scanning — automated tools and manual checks.
3. Code review — find vulnerabilities in custom components and templates.
4. Server configuration — check PHP, web server, database.
5. Report — describe vulnerabilities and recommendations.
6. Remediation — we can fix found issues turnkey.

Audit Summary

Method Comparison

Timeline and Pricing

An audit takes 1 to 3 days depending on project complexity. Pricing is individually calculated. You receive a detailed report with step-by-step instructions for fixing each vulnerability.

What You Get

• Quality guarantee: we are confident in our methods, so we guarantee the correct remediation of all critical vulnerabilities.
• Prompt support after the audit.
• Recommendations for ongoing security monitoring.

Contact us to order an audit and protect your project. Get expert consultation today.