Open Worldwide Application Security Project · Published by OWASP Foundation
OWASP is the most widely adopted framework for web application security testing worldwide. The OWASP Testing Guide provides a comprehensive methodology for identifying vulnerabilities in web applications, APIs, and mobile applications through systematic testing procedures. Originally published in 2004 and continuously updated by a global community of security professionals, the OWASP framework covers every aspect of application security from authentication and session management to input validation, cryptography, and business logic testing.
The OWASP Top 10, updated periodically, defines the most critical web application security risks and serves as an industry-standard awareness document referenced by compliance frameworks including PCI DSS, SOC 2, and ISO 27001. The OWASP Application Security Verification Standard (ASVS) provides a basis for testing technical security controls, while the OWASP Mobile Application Security Verification Standard (MASVS) extends this to mobile platforms.
Penetration testing providers that follow OWASP methodology ensure comprehensive coverage of known application-level attack vectors through a structured, repeatable testing process that is transparent and well-documented.
UK offensive security consultancy delivering CREST-accredited penetration testing, adversary simulation and CBEST, TIBER-EU and TBEST threat-led testing, mainly for financial services and other large organisations.
Penetration testing firm trusted by nine of the top ten US banks, with the Resolve platform for continuous attack surface management.
Global enterprise cybersecurity consultancy founded in 1999 in Oxford, holding rare CREST STAR-FS accreditation and delivering penetration testing, red and purple teaming, and PCI QSA services across five international offices.
Global Big Four professional services firm delivering CREST, CHECK, and CBEST-accredited penetration testing and red teaming services from London, serving the UK's largest enterprises and regulated organisations.
US penetration testing firm founded in 2011, running 600+ engagements a year with a fully remote, US-based team. Manual, expert-led testing across web, network, cloud, mobile, wireless, OT/ICS, and AI/LLM. Gartner Sample Vendor for PTaaS.
CREST and CHECK-accredited UK penetration testing and managed security provider formed in 2026 from Pentest People, Bulletproof, and Target Defense, with CREST STAR/TLPT-FS capability and the GuardNest vulnerability management platform.
Elite UK offensive security consultancy specialising in CBEST/STAR/TIBER red teaming, advanced adversary simulation, and CREST-accredited penetration testing for FTSE 100 clients.
Full-service London-based cybersecurity consultancy with CREST, CHECK, and NCSC accreditations delivering offensive testing, managed detection, and strategic advisory services.
Global managed security provider with the elite SpiderLabs penetration testing team and deep PCI DSS compliance expertise.
Manchester-based independent cybersecurity consultancy with over 20 years of experience delivering CREST and CHECK-accredited penetration testing, red teaming, and compliance certification services.
CREST and CHECK-accredited UK penetration testing consultancy with CBEST approval, specialising in infrastructure, application, and simulated attack assessments across the public and private sectors.
CHECK and CREST-accredited Birmingham-based cyber security consultancy with over 15 years of experience delivering penetration testing, red teaming, and OT security assessments for government and private sector clients.
The OWASP Top 10 is a regularly updated awareness document listing the most critical web application security risks. It includes Broken Access Control, Cryptographic Failures, Injection, Insecure Design, Security Misconfiguration, Vulnerable Components, Authentication Failures, Integrity Failures, Logging Failures, and SSRF.
OWASP itself is not a certification, it is an open-source project and methodology. However, many certifications (like GWAPT and OSWE) incorporate OWASP testing techniques, and compliance frameworks reference OWASP as a testing standard.
The OWASP Top 10 is typically updated every 3-4 years based on data analysis of real-world vulnerabilities. The most recent version was published in 2021, with updates expected based on evolving threat data.