Every website, web application, and API is a potential entry point for attackers. Security vulnerabilities can be introduced through custom code, third-party components, plugins, frameworks, configuration errors, and infrastructure changes. As applications evolve, new risks can appear without warning.
Testing website vulnerabilities online helps organizations identify security weaknesses before they can be exploited. Rather than relying solely on perimeter defenses, vulnerability scanning helps uncover and eliminate the flaws that attackers are actively searching for.
Acunetix is an online website vulnerability scanner that tests running applications from the outside in, helping you discover vulnerabilities in the same way attackers would. This provides visibility into the risks that actually exist in your live environment.
While free website security tests can identify some externally visible issues, professional vulnerability scanning provides deeper coverage through authenticated testing, advanced crawling, API security testing, and vulnerability validation. This helps organizations identify more risks and spend less time investigating findings.
A website security test can uncover vulnerabilities that may allow attackers to:
- Access sensitive customer or business data
- Execute unauthorized commands or code
- Bypass authentication controls
- Hijack user sessions
- Manipulate application behavior
- Gain access to internal systems through exposed applications and APIs
What vulnerabilities can a website security test find?
Modern websites and web applications can be affected by a wide range of security vulnerabilities. Effective website security testing should identify both common attack vectors and less obvious weaknesses that could expose sensitive data or business functionality.
Acunetix checks for thousands of web application security issues, including:
- SQL injection, including blind SQLi
- Cross-site scripting (XSS), including blind XSS
- XML external entity (XXE) injection
- Server-side request forgery (SSRF)
- Host header injection attacks
- Email header injection
- Authentication and authorization weaknesses
- Security misconfigurations
- Known vulnerabilities in web technologies and components
In addition to custom applications, Acunetix helps identify security issues affecting popular content management systems and frameworks, including WordPress, Drupal, and Joomla. Scans can uncover:
- Vulnerable plugins, themes, templates, and extensions
- Outdated software components
- Weak administrative configurations
- User account enumeration issues
- Exposed configuration files and sensitive resources
- Malicious code hidden within plugins or extensions
Modern applications increasingly rely on APIs to deliver business functionality and exchange data. As a result, website security testing must extend beyond the visible user interface. Acunetix helps organizations assess both web application and API security risks to provide broader visibility across the application attack surface.
Why use Acunetix as your website vulnerability scanner?
Not all website vulnerability scanners deliver the same results. The value of a security test depends on how thoroughly the application is assessed, how accurately vulnerabilities are identified, and how easily teams can act on the findings.
Many website vulnerability scanners generate large numbers of findings that require manual verification. This slows remediation efforts, creates alert fatigue, and makes it difficult to distinguish exploitable vulnerabilities from lower-priority issues.
Acunetix helps teams focus on real risk by combining broad vulnerability coverage with validation capabilities that can automatically confirm many vulnerabilities. By providing evidence that helps verify security issues, Acunetix reduces time spent investigating false positives and allows security and development teams to focus on confirmed vulnerabilities that represent genuine exposure.
Unlike basic website vulnerability checkers that provide limited visibility into running applications, Acunetix is a modern dynamic application security testing (DAST) solution that combines deep crawling, authenticated testing, API security testing, and vulnerability validation to deliver broader coverage and more actionable results.
Key capabilities include:
- Advanced crawling technology for complex JavaScript-heavy and single-page applications
- Authenticated scanning to test password-protected functionality and user workflows
- Out-of-band vulnerability detection for identifying issues that traditional scanners often miss
- Validation capabilities that help confirm vulnerabilities and reduce false positives
- Detailed remediation guidance to accelerate vulnerability resolution
- Security testing for modern web applications and APIs
Accelerate remediation with actionable results
Finding vulnerabilities is only the first step. To reduce risk effectively, organizations need to prioritize remediation, verify fixes, and ensure security issues are addressed within existing development workflows.
Acunetix helps streamline remediation by integrating security findings into existing development processes. Security issues can be sent directly to popular issue-tracking and development platforms, helping teams address vulnerabilities more efficiently.
Comparison reporting makes it easy to verify that remediation efforts were successful and confirm that vulnerabilities have been eliminated.
By helping teams identify, validate, and remediate exploitable vulnerabilities, Acunetix supports a more efficient and risk-focused approach to application security.
Request a demo to see how Acunetix helps organizations gain visibility across their web applications and APIs, focus on confirmed vulnerabilities, and accelerate remediation with actionable security testing results.
Frequently asked questions about website vulnerability testing
A website vulnerability test is a security assessment that scans websites, web applications, and APIs for exploitable weaknesses that could allow unauthorized access, data exposure, account compromise, or other attacks. Modern website vulnerability scanners help organizations identify, validate, and prioritize security risks before they can be exploited.
You can check website vulnerabilities online using a website vulnerability scanner such as Acunetix. An online website vulnerability scanner crawls your application and tests it for security weaknesses that attackers may be able to exploit.
Website security scanners can identify a wide range of vulnerabilities, including SQL injection, cross-site scripting (XSS), authentication weaknesses, security misconfigurations, server-side request forgery (SSRF), exposed sensitive files, and many other application security risks.
Free website vulnerability scanners can help identify some externally visible issues, but they often provide limited coverage. Professional vulnerability scanners typically offer deeper crawling, authenticated testing, API security testing, vulnerability validation, reporting, and remediation workflows that help organizations identify and address more security risks.
Yes, with the right tool and scan setup, although best practice is to scan production-identical environments. Website vulnerability scanners are commonly used to assess production applications. Organizations often perform regular scans against live environments to identify newly introduced vulnerabilities and verify their security posture.
Yes. Acunetix supports authenticated scanning, allowing security teams to test password-protected areas of websites and applications that would otherwise remain inaccessible during a scan.
Yes. APIs are a critical part of modern application architectures and often expose sensitive functionality and data. Acunetix helps organizations test APIs alongside traditional web applications to improve coverage across the entire attack surface.
Security testing should be performed regularly and whenever significant application changes occur. Continuous or recurring vulnerability scanning helps identify newly introduced security issues before attackers can exploit them.
Prioritize remediation based on risk and business impact, then verify that fixes have been implemented successfully. Acunetix provides detailed reports, remediation guidance, workflow integrations, and validation capabilities to help security and development teams manage remediation efficiently.
The most effective way to scan a website for vulnerabilities is to use a professional website security vulnerability scanner that can assess both public-facing and authenticated areas of the application. Look for a solution that provides comprehensive coverage, API security testing, validated findings, and remediation guidance so teams can focus on the vulnerabilities that matter most.
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“We use Acunetix as part of our Security in the SDLC and to test code in DEV and SIT before being promoted to Production.”
Kurt Zanzi, Xerox CA-MMIS Information Securtiy Office, Xerox