OWASP Top 10 2021

OWASP released a draft for 2021, the all-new OWASP Top 10 2021 comes with three new categories and position changes.

The OWASP Top 10 is a minimal or a basic security testing requirement for every web application.

The OWASP Top 10 was first introduced in 2003, and for there it took many revisions, now the draft report for 2021 is available now.

OWASP said that “the OWASP Top 10 2021 is a good start as a baseline for checklists and so on, but it’s not in itself sufficient”.

OWASP Top 10 2021

A01:2021 – Broken Access Control

Moves to the top from the fifth position in 2017, it is also called an authorization that defines how a web application grants access to content and functions to some users and not others.

A02:2021 – Cryptographic Failures

Shifted from third to the second position, previously it was called as Sensitive Data Exposure. The lack of encryption often leads to sensitive data exposure or system compromise.


Moves down to the third position from No.1, it is a technique in which the attacker takes non-validated input vulnerabilities and injects SQL commands through a web application that are executed in the backend database.

A04:2021 – Insecure Design

This is a new category with the OWASP Top 2021, it focuses on the risks related to design and architectural flaws.

“Insecure design is a broad category representing many different weaknesses, expressed as missing or ineffective control design”.

A05:2021 – Security Misconfiguration

Moved from 6th to fifth position, it focuses on the security hardening across the application stack or improperly configured permissions on cloud services.

A06:2021 – Vulnerable and Outdated Components

It was moved from the second position to six, as not enough attack data is available, this category focuses on the vulnerable versions of all components used on both client-side and server-side.

A07:2021 – Identification and Authentication Failures

Previously it was known as Broken Authentication, this category focuses on authentication failures.

It leads to automated attacks such as credential stuffing in which attackers use a list of usernames and passwords.

A08:2021 – Software and Data Integrity Failures

This is a new category introduced on OWASP Top 10 2021, it focuses on software and data integrity failures relate to code and infrastructure that do not protect against integrity violations.

A09:2021 – Security Logging and Monitoring Failures

Moves one step from the tenth position, this category helps to detect, escalate, and respond to active breaches.

A10:2021 – Server-Side Request Forgery (SSRF)

This category focuses on securing a connection that a web application is fetching a remote resource without validating the user-supplied URL.

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Guru is an Ex-Security Engineer at Comodo Cybersecurity. Co-Founder - Cyber Security News & GBHackers On Security.


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