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we have audited more than 50 projects, and typical issues repeat: SQL injections in custom queries, XSS in forms, outdated PHP versions (e.g., 5.x), permissions set to 777, and missing security headers.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We most often find SQL injections in custom components, XSS in extensions, outdated core versions, incorrect permissions, weak server configuration, and lack of two-factor authentication.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.

Web Application Security: HTTPS, CSP, XSS, CSRF, WAF, DDoS Protection

A website breach rarely looks like in movies. More often it's: a bot finds an unprotected /admin/export endpoint, downloads the customer database, and closes the connection. Or: through an outdated WordPress plugin, a web shell is uploaded, and the server starts sending spam. Or quieter: an XSS in a comment field allows stealing admin session cookies, unnoticed for months. We have analyzed dozens of such cases — each vulnerability could have been fixed at the development or audit stage.

Web application security is not a single setting. It's layers of protection, each closing a separate class of attacks. Order an audit — we'll assess the project and deliver a turnkey plan within 2–4 weeks.

How do we ensure comprehensive web application security?

HTTPS and Proper TLS Configuration

HTTPS is the minimum mandatory level. But having an SSL certificate and having a properly configured TLS are different things.

In Nginx/Apache configuration we check:

• Protocols: only TLS 1.2 and TLS 1.3, SSLv3 and TLS 1.0/1.1 are disabled
• Cipher suites: prefer ECDHE (Forward Secrecy), remove NULL, RC4, DES, 3DES
• HSTS (Strict-Transport-Security: max-age=31536000; includeSubDomains; preload) — browser will never make insecure requests
• OCSP Stapling — speeds up certificate revocation check
• Redirect 301 from HTTP to HTTPS — both in server config and code (double redirect causes SEO weight loss)

Check: SSL Labs (ssllabs.com/ssltest) should show A or A+. If B, the configuration is weak.

Let's Encrypt + Certbot for production is standard. Automatic renewal via certbot renew in cron. Wildcard certificates for subdomains via DNS-01 challenge.

Content Security Policy: The Most Powerful and Complex Protection

CSP is an HTTP header that tells the browser which sources are allowed to load resources. A properly configured CSP completely blocks most XSS attacks, even if the vulnerability exists in the code.

The problem: breaking the site with an incorrect CSP is easy. default-src 'none' — and fonts, images, JS stop working. So we start with Content-Security-Policy-Report-Only — CSP logs violations but does not block anything. We monitor reports for 2–4 weeks, refine the policy, then switch to enforcement mode.

Example of a real policy for a site with Google Analytics, Google Fonts, and Stripe:

Content-Security-Policy:
  default-src 'self';
  script-src 'self' https://www.googletagmanager.com https://js.stripe.com 'nonce-{random}';
  style-src 'self' https://fonts.googleapis.com 'unsafe-inline';
  font-src 'self' https://fonts.gstatic.com;
  frame-src https://js.stripe.com;
  img-src 'self' data: https://www.google-analytics.com;
  connect-src 'self' https://api.stripe.com https://www.google-analytics.com;
  report-uri /csp-report;

nonce — a random string generated server-side per request. Inline scripts with the correct nonce are allowed; without nonce, they are blocked. This completely breaks XSS via <script>alert(1)</script>.

'unsafe-inline' in style-src is a compromise for inline styles. It's better to remove it by moving all styles to CSS files, but that requires refactoring.

Why XSS Remains the Most Common Vulnerability?

XSS (Cross-Site Scripting) — injection of JS code through user input. According to OWASP, XSS is in the top 3 web application vulnerabilities. Three types:

Protection: never insert user input into HTML without escaping. In PHP — htmlspecialchars() with ENT_QUOTES. In Laravel Blade templates — {{ $var }} is safe, {!! $var !!} is dangerous. In React — {variable} is safe, dangerouslySetInnerHTML is dangerous. For Rich Text — use htmlpurifier on PHP or DOMPurify in the browser.

CSRF: Protecting Forms and APIs

CSRF (Cross-Site Request Forgery) — an attacker forces the victim's browser to send a request on their behalf. Example: a user is logged into a bank, opens a malicious page, which makes fetch('https://bank.ru/transfer?to=evil&amount=50000') — if the bank is unprotected, money is transferred.

CSRF tokens — standard protection for forms: the server generates a random token, stores it in the session, and inserts it as a hidden field in the form. On POST request, the token is verified. The attacker does not know the token. Laravel does this automatically with @csrf.

SameSite cookies — modern protection: SameSite=Strict or SameSite=Lax prevents the browser from sending cookies in cross-site requests. Works in all modern browsers.

API without sessions (JWT, Bearer tokens) — CSRF is irrelevant if the token is not stored in a cookie (but in the Authorization header or localStorage). However, localStorage is vulnerable to XSS — so for sensitive data, HttpOnly cookies with SameSite are preferable.

WAF and DDoS Protection

WAF (Web Application Firewall) filters HTTP traffic for attacks: SQL injection, XSS, path traversal, known exploit patterns. Options:

• Cloudflare WAF — cloud-based, OWASP Top 10 rules out of the box, custom rules via expressions. Managed Rules automatically block new threats.
• ModSecurity (Nginx/Apache) — self-hosted, OWASP Core Rule Set (CRS). Flexible but requires tuning and monitoring of false positives.
• AWS WAF — for infrastructure on AWS, integrates with CloudFront and ALB.

DDoS protection. Cloudflare at L3/L4/L7 is the de facto standard for most sites. Automatic mitigation of volumetric attacks, Under Attack Mode during active attacks. For critical infrastructure — Cloudflare Magic Transit or specialized solutions (Qrator, StormWall for the Russian market).

Rate Limiting at the application level — an additional layer. Laravel ThrottleRequests middleware: 60 requests per minute per IP for general endpoints, 5 for /login and /password/reset. Redis as a counter store — mandatory for horizontally scalable systems (otherwise limits are not synchronized between servers).

Other Mandatory Measures

Security headers. Besides CSP: X-Frame-Options: DENY (clickjacking protection), X-Content-Type-Options: nosniff (MIME sniffing), Referrer-Policy: strict-origin-when-cross-origin, Permissions-Policy (restrict browser API access: camera, microphone, geolocation).

SQL injection. Prepared statements everywhere. No concatenation of user input into SQL strings. ORM (Eloquent, Doctrine) protects by default. $wpdb->prepare() in WordPress is mandatory.

Dependency updates. composer audit and npm audit in CI/CD pipeline. Dependabot or Renovate for automatic PRs with updates. Critical CVEs — patch within 24 hours.

Secrets and configuration. .env — never in Git. Secrets in production — via CI/CD environment variables (GitHub Secrets, GitLab CI Variables) or HashiCorp Vault. Leak detection: git-secrets, truffleHog in pre-commit hooks.

How We Work

1. Audit — code scanning, configuration review, dependency analysis, manual business logic verification.
2. Planning — vulnerability remediation plan, stack selection (CSP, WAF, rate limiting).
3. Implementation — TLS setup, CSP configuration, headers, Rate Limiting, WAF.
4. Testing — re-penetration test, load testing, false positive check.
5. Deployment and Monitoring — enable production CSP, set up alerts, train the team.

What's Included

• Report with found vulnerabilities and recommendations (PDF + code snippets)
• Ready TLS configuration (Nginx/Apache)
• CSP policy with Report-Only and production versions
• WAF and Rate Limiting setup
• Dependency update plan
• Access to monitoring tools (Sentry, Datadog)
• 30 days of post-audit support (consultations, fixes)

Timeline and Cost

The budget is calculated individually — contact us for a project evaluation.