How to Scan Your Website for Vulnerabilities

Scanning your website for vulnerabilities means using automated or manual tools to find security flaws — misconfigurations, outdated software, backdoors — before attackers find them first.

This guide covers the best tools for the job, how to interpret the results, and what steps to take after the scan.

Why You Should Scan Your Site Regularly

Attackers run bots that crawl the internet around the clock looking for vulnerable versions of WordPress, Joomla, abandoned plugins, and misconfigured servers. An unscanned site can be compromised for weeks or months before the owner notices.

Regular scanning lets you:

• Detect malware injected into your files or database.
• Identify plugins, themes, or CMS versions that are out of date with known vulnerabilities.
• Find missing HTTP security headers or insecure configurations.
• Discover phishing pages or malicious redirects harming your SEO and reputation.

Google can flag your site as dangerous and remove it from search results if it detects malware. Monthly scanning is the minimum recommended; weekly if you handle payments or personal data.

Free Tools to Scan for Vulnerabilities

Sucuri SiteCheck

The most popular starting point. Enter your URL at sitecheck.sucuri.net and within seconds you'll see if your site appears on blacklists (Google, McAfee, Yandex, etc.), if there is visible malware in the source code, and whether your security headers are configured.

Limitation: it only analyzes code the browser can see — it doesn't access server files or the database.

VirusTotal

Submits your site URL to more than 70 antivirus engines simultaneously. Useful for confirming whether a site is already flagged as malicious. Available at virustotal.com.

Mozilla Observatory

Focuses on HTTP security headers, TLS configuration, and security policies. Ideal for auditing the server configuration layer. Available at observatory.mozilla.org.

WPScan (WordPress)

A tool specialized for WordPress sites. It detects plugin and theme versions with known vulnerabilities, enumerable users, and poor security configurations. Available as a command-line tool and with a limited free web version at wpscan.com.

Advanced and Paid Tools

For most small businesses, the combination of Sucuri SiteCheck + free WPScan covers 80% of the most common risks. Paid tools add real-time monitoring and automated remediation.

How to Run a Scan Step by Step

Step 1: Quick External Scan

Go to sitecheck.sucuri.net and enter your domain. Check:

• Does it appear on any blacklist?
• Are there anomalies in the source code (unrecognized external scripts)?
• Are the security headers configured?

Step 2: Server Configuration Analysis

Submit your domain to observatory.mozilla.org and ssllabs.com/ssltest. The first audits headers; the second evaluates TLS configuration (versions, ciphers, certificate chain).

Step 3: CMS and Plugin Scan

If you use WordPress, run WPScan:

wpscan --url https://yourdomain.com --enumerate vp,vt,u

vp = vulnerable plugins, vt = vulnerable themes, u = enumerable users. WPScan queries its database of known vulnerabilities (CVEs).

Step 4: Server File Review (if you have SSH access)

Look for recently modified files that you didn't change:

find /var/www/html -name "*.php" -newer /var/www/html/wp-config.php -ls

A PHP file modified two days ago inside an images folder is a red flag.

Step 5: Check the Database

Look for malicious redirects or scripts injected into the database:

SELECT * FROM wp_options WHERE option_name IN ('siteurl','home');

If the values point to a domain that isn't yours, your database is compromised.

For a deeper infrastructure diagnosis, the specialists at elenlace.com conduct full security audits that go beyond automated scanners.

What to Do With Scan Results

A scan without action is worthless. Prioritize like this:

• Critical (active malware / blacklist): act within hours. Take the site offline if needed, clean the malware, and request a review from Google/McAfee.
• High (plugin with active CVE, outdated CMS version): update within 24–48 hours.
• Medium (missing headers, TLS 1.1 active): schedule for your next maintenance cycle (within a week).
• Low (hardening recommendations): apply when time permits.

Document each finding, the action taken, and the date. This helps demonstrate due diligence if an incident ever occurs, and shows continuous improvement to your clients. Find more resources in our SSL and web security guide.

Key Takeaways

• Periodic scanning is the only way to find vulnerabilities before attackers exploit them.
• For WordPress sites, WPScan + Sucuri SiteCheck is a highly effective free combination.
• An external scan only sees what the browser sees — a full review requires server and database access.
• Prioritize findings: active malware first, outdated software second, configuration hardening after.
• Document and follow up — a scan without action doesn't improve your security.

Want an expert to review your site for you? The team at elenlace.com offers security audits, malware removal, and continuous monitoring for websites — contact us today.

FAQ

How often should I scan my website?

At a minimum, once a month. If you handle card payments, personal data, or run a high-traffic site, weekly scanning or continuous monitoring with a tool like Sucuri or Wordfence Premium is ideal.

Can a vulnerability scan damage my site?

Passive external scanners (Sucuri SiteCheck, VirusTotal, Observatory) are completely safe — they only read what the browser sees. Active scanners that test real exploits (like ZAP or Burp Suite in active mode) can generate load or errors; use those in a staging environment, never in production.

What is a CVE and why does it matter in a scan?

CVE (Common Vulnerabilities and Exposures) is the global system for identifying known vulnerabilities. When WPScan says a plugin has a CVE, it means the vulnerability is public and attackers already have tools to exploit it. Updating immediately is mandatory.

My scan shows "clean" but my site is behaving strangely. What should I do?

Automated scanners don't catch everything. Modern malware obfuscates itself, activates only for certain browsers or IP addresses, or hides in the database. If something looks wrong but the scan says it's clean, request a manual review of files and the database from a professional.

Useful resources

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• GoDaddy
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