OnSecurity's Web Application Penetration Testing Service is a CREST-accredited security assessment service that identifies vulnerabilities in business web applications through a combination of manual testing techniques and automated tools. The service is conducted by CREST-certified testers who assess web applications for common vulnerability classes, including: - Injection flaws enabling unauthorised access - Authentication weaknesses allowing account takeovers - Broken access controls granting improper permissions - Security misconfigurations leaving entry points exposed - Database interaction errors exposing sensitive data - Input validation problems enabling injection attacks - Application logic flaws that can be exploited Testing is managed through an online platform that provides instant quotes, customisable test configurations, and automated workflow notifications. Findings are delivered via the platform in the form of detailed reports that include both technical insights and high-level summaries, available on demand without delay. The service also offers free retests for resolved vulnerabilities within a defined window after remediation. Subscription plans are available that combine regular penetration tests with continuous vulnerability scanning, providing ongoing monitoring and threat intelligence alongside periodic assessments. The service addresses compliance requirements and is positioned for organisations that need to demonstrate security due diligence to customers or regulators.