Web application security is one of the most critical pillars for protecting sensitive data and enterprise systems. To assist developers, security teams, and organizations in understanding the major threats, OWASP (Open Web Application Security Project) periodically publishes the OWASP Top 10, an updated list of the top vulnerabilities affecting web applications.
The latest version of the OWASP Top 10, published in 2021, continues to be the industry benchmark in 2025, reflecting modern threats and challenges faced in secure development.
In this article, we explore each of these vulnerabilities and how to mitigate them to strengthen your application.
OWASP Top 10
1. Broken Access Control
Access control remains at the top of the threat list. Flaws in this area allow attackers to access resources or data without proper authorization.
- Example: Users accessing data from other clients or administrative functions.
- Mitigation: Implement strict authorization controls and conduct access testing at all levels of the application.
2. Cryptographic Failures
Vulnerabilities in cryptographic algorithms or their implementation can expose sensitive data.
- Example: Use of deprecated algorithms like MD5 or outdated TLS.
- Mitigation: Adopt modern encryption and regularly validate its implementation.
3. Injection
Injection attacks, such as SQL, NoSQL, and OS command injections, remain relevant due to poor input validation.
- Example: Inserting malicious code into input fields.
- Mitigation: Use parameterized queries and validate all user inputs.
4. Insecure Design
A new entry on the list, this item reflects the importance of designing secure applications from the ground up.
- Example: Lack of protections against common attacks within the design scope.
- Mitigation: Conduct "Threat Modeling" during the development lifecycle.
5. Security Misconfiguration
Incorrect or overly permissive configurations can expose systems.
- Example: Exposure of internal APIs without proper authentication.
- Mitigation: Regularly review configurations and automate the validation process.
6. Vulnerable and Outdated Components
Outdated libraries or frameworks often contain known vulnerabilities.
- Example: Use of old versions of libraries like Log4j.
- Mitigation: Monitor known vulnerabilities and regularly update dependencies.
7. Identification and Authentication Failures
Flaws in authentication mechanisms continue to be exploited by attackers to compromise accounts.
- Example: Allowing weak or reused passwords.
- Mitigation: Implement multi-factor authentication (MFA) and strong password policies.
8. Security Logging and Monitoring Failures
The lack of effective monitoring can delay the detection of an attack or breach.
- Example: Absence of detailed logs or real-time monitoring.
- Mitigation: Adopt centralized monitoring solutions and regularly review logs.
9. Sensitive Data Exposure
Poorly protected data continues to be a primary target.
- Example: Storing passwords in plain text.
- Mitigation: Use strong encryption for storing and transmitting sensitive data.
10. Server-Side Request Forgery (SSRF)
APIs are often misconfigured, exposing systems.
- Example: Allowing excessive requests without proper controls.
- Mitigation: Implement strict validation and access control on APIs.
Cybersecurity should not be treated as a final step in development but as an ongoing process. The OWASP Top 10 reflects the modern challenges that companies face, highlighting the need for good security practices.
HackerSec specializes in offensive cybersecurity and can help your organization efficiently identify and mitigate these vulnerabilities. Learn more about our services at: https://hackersec.com/empresas/.
By implementing regular pentests and keeping your applications up to date, your company will be prepared to face the security risks that arise in an increasingly complex digital environment.