Laravel Security Vulnerabilities: What Every Australian Business Needs to Know

Security is the number one reason businesses call us with urgency. Not "we'd like to upgrade eventually" — but "we just had an incident" or "our hosting provider told us we have critical vulnerabilities." Here's what you actually need to know.

Why outdated Laravel applications are targets

Laravel is one of the most popular PHP frameworks in the world. That popularity makes it a known target. Attackers build automated scanning tools that probe for known vulnerabilities in specific Laravel versions — including vulnerabilities that have been publicly disclosed and have known exploit code available.

When you run an end-of-life Laravel version, you're running software with known, unfixed vulnerabilities. The CVE database (the public record of known security vulnerabilities) lists dozens of historical Laravel and PHP vulnerabilities. Attackers know which versions are affected and they scan the internet for them.

What attackers actually do with vulnerable Laravel apps

Security incidents aren't always dramatic. Here's what actually happens when a Laravel application is compromised:

Data exfiltration

Customer data, payment information, business records — if it's in your database, it can be extracted. Depending on what data you hold and your obligations under Australian privacy law (the Privacy Act 1988, and the Notifiable Data Breaches scheme), a data breach carries serious legal and financial consequences.

Server takeover

Some vulnerabilities allow attackers to execute arbitrary code on your server — meaning they can do anything your application can do, and more. This includes installing malware, using your server to send spam, or using it as part of a botnet.

Defacement and ransomware

Less sophisticated attackers will simply deface your website or install ransomware — encrypting your data and demanding payment for the decryption key.

Silent persistence

The most dangerous attacks are the ones you don't notice. Attackers who want long-term access install backdoors and then quietly watch. You might be compromised for months before you know it.

Common Laravel-specific vulnerabilities to know about

SQL injection

Laravel's Eloquent ORM and query builder protect against SQL injection when used correctly. But raw queries using DB::statement() or DB::select() with unescaped user input do not. Older codebases frequently have these patterns.

Mass assignment

Laravel's $fillable and $guarded model properties exist specifically to prevent mass assignment vulnerabilities — where an attacker passes unexpected fields to update model attributes they shouldn't be able to touch (like is_admin). Codebases without proper model configuration are at risk.

Exposed .env files

The .env file contains your application's secrets — database credentials, API keys, mail server passwords. Misconfigured servers can expose this file publicly. It's more common than you'd think.

Debug mode in production

Running Laravel with APP_DEBUG=true in production exposes detailed error messages including file paths, configuration values, and in some cases the contents of the .env file. We see this regularly.

Unpatched dependencies

Your application's security is only as strong as its weakest dependency. A vulnerability in a third-party package you haven't updated in two years is a vulnerability in your application.

The Australian legal context

Australian businesses handling personal information have obligations under the Privacy Act 1988. The Notifiable Data Breaches (NDB) scheme requires businesses to notify affected individuals and the Office of the Australian Information Commissioner (OAIC) when a data breach is likely to result in serious harm.

Failing to maintain your software — including applying security patches — is relevant context in any regulatory investigation following a breach. "We were running an unsupported version and hadn't applied patches in three years" is not a defence.

What to do right now

1. Know what version you're on. SSH into your server and run php artisan --version. If you don't know how to do that, get someone who does.
2. Check your APP_DEBUG setting. It should be false in production. No exceptions.
3. Check that .env is not publicly accessible. Visit yourdomain.com/.env in a browser. If you see anything other than a 404, fix it immediately.
4. Run composer audit. This checks your installed packages against the PHP Security Advisories database and lists known vulnerabilities.
5. Get a proper audit. The above steps catch the obvious issues. A proper security audit goes much deeper — reviewing your authentication implementation, authorisation policies, input validation, session handling, and much more.

Our Laravel Audit covers security comprehensively — not as a checklist, but as a real review of how your application handles sensitive operations.

Book a Laravel security audit →