The OWASP Top 10 is a list of the 10 most common web application security risks. By writing code and performing robust testing with these risks in mind, developers can create secure applications that keep their users’ confidential data safe from attackers. The OWASP Top 10 introduced three new web application security risks – XML external entities , insecure deserialization, and insufficient logging and monitoring. This new risk category focuses on server-side forgery attacks that force the server to issue forged HTTP requests on its behalf. These kinds of issues happen when a web application fetches remote resources without validating user-supplied URLs.

  • This new category emphasizes securing applications by integrating OWASP API security into software design early in the application development cycle to avoid risks from architecture and design flaws.
  • The attacker’s hostile data can trick the interpreter into executing unintended commands or accessing data without proper authorization.
  • The 2021 version of the Top 10 sees Injection fall to third place, even with XSS getting rolled into it.
  • Toward this end, they first published a list of the top ten most common application vulnerabilities in early 2003, based on community evaluation and real incidents.

OWASP provides actionable information and acts as an important checklist and internal Web application development standard for a lot of the largest organizations in the world. Users should not function outside of their planning permissions with access management. Unauthorized information access, alteration or deletion of all records, or executing a business process outside of the users limits are all common outcomes of failures. In modern systems, SQL injection often happens by inputting malicious SQL requests to an endpoint of an API provided by a service. SQL injection might allow a hacker to get root access to a host and get full control in its most important form. Your application can further be exposed to information leakage if logging and alerting events are visible to users or attackers.

Ultimate Guide To Getting Started With Appsec

Cross-site scripting attacks and SQL injections are the most common injection attacks, but there are others, including command injections, code injections, and CCS injections. Access control refers to permission levels for authenticated users and enforcing related restrictions on actions outside those levels. The 2021 OWASP Top 10 highlights a strategic approach to security that includes the architecture that supports the application, as well as the APIs, data, and so much more. The methodologies for testing and monitoring your applications through development to production are also critical in this framework. Sensitive data exposure issues can be introduced when applications access unencrypted data, particularly personally identifiable information and other regulated data types. Examples are often found when weak cryptographic cyphers are used in legacy applications, secure transport protocols are implemented incorrectly, or data-centric security is not in use. Attackers gain access to sensitive user data that gives them control in real life.

  • The principle of least privilege is an oft-repeated adage in the security world – and for good reason.
  • If you’re familiar with the 2020 list, you’ll notice a large shuffle in the 2021 OWASP Top 10, as SQL injection has been replaced at the top spot by Broken Access Control.
  • The comprehensive list is compiled from a variety of expert sources such as security consultants, security vendors, and security teams from companies and organizations of all sizes.
  • Veracode offers comprehensive guides for training developers in application security, along with scalable web-based tools to make developing secure applications easy.
  • The OWASP Top 10 is a list of the 10 most common web application security risks.

Server-Side Request Forgery issues arise when a web application does not validate the user-supplied URL when fetching a remote resource. This enables attackers to force the application to send a crafted request to an unexpected destination, even if protected by a firewall, VPN, or some other type of network access control list . Broken access control is a class of security vulnerabilities where authorization checks are insufficient to prevent unauthorized entities from accessing data or performing functions.

Automating Cisco Dna Center Operations Using Apis

Penetration testing is a great way to find areas of your application with insufficient logging too. The Open Web Application Security Project, or OWASP, is a nonprofit that strives to educate the cybersecurity industry about prominent web application bugs and the risks they present. Every three or four years, OWASP reaches out to the companies and organizations with a high-level and wide-sweeping view of the most common and highest risk vulnerabilities for feedback on common and emerging threats. These contributors include pen testing companies, bug bounty organizations, and vendors and consultants that do application testing and code reviews.

XML is everywhere—from SVG and image files to networking protocols and document formats such as PDF and RSS. Attackers reference external entities in XML input that results in processors exploited to extract data, execute code remotely, or impact network services. This vulnerability poses a grave threat to the security of the application and the resources it accesses and can also severely compromise other assets connected to the same network.

  • While some known vulnerabilities lead to only minor impacts, some of the largest known breaches, such as Heartbleed and Shellshock, have relied on exploiting known vulnerabilities in shared components.
  • API Runtime Security API Runtime Security provides protection to APIs during their normal running and handling of API requests.
  • By definition, an insecure design cannot be fixed by proper implementation or configuration.
  • All of the content is included in this Haekka version of the OWASP Top 10.
  • OWASP is a leading not-for-profit information security organization focused on helping developers and the people who commission the most vulnerable applications to use more secure software development techniques.
  • Noname Security aims to resolve API vulnerabilities across 4 key pillars — Discover, Analyze, Remediate, and Test.

There are also two risks on the list that were sourced from a community survey of front-line application security and development experts. You can read more about the OWASP Top 10 methodology onlinehereand below is an overview of the changes, 2017 versus 2021. OWASP Top 10 is a publicly shared list of what the Foundation considers the ten most critical web application security vulnerabilities in a standard awareness document for developers. According to OWASP, any weakness that could enable a bad actor to cause losses and harm to any stakeholder of an application, including users, is a security vulnerability. The de facto standard for web application security is the Open Web Application Security Project’s Top 10 Project. It lists the ten most prevalent security threats based on an extensive amount of data and community feedback and was updated in late 2017. Allowing such probes to continue can raise the likelihood of successful exploits.

Owasp Top Ten A7:2017

As with other vulnerabilities, attackers can gain access to data, accounts, and functions that they shouldn’t. Training developers in best practices such as data encoding and input validation reduces the likelihood of this risk. Sanitize your data by validating that it’s the content you expect for that particular field, and by encoding it for the “endpoint” as an extra layer of protection. The OWASP Top 10 is a great foundational resource when you’re developing secure code. In our State of Software Security Volume 11, a scan of 130,000 applications found that nearly 68% of apps had a security flaw that fell into the OWASP Top 10. What I hope this article makes clear is that the topic of web security should remain top-of-mind for you as a web developer at any level.

  • XSS allows malicious code to be added to a web page or app, say via user comments or form submissions used to define the subsequent action.
  • The OWASP Top 10 list is developed by web application security experts worldwide and is updated every couple of years.
  • OWASP Top Ten means Top 10 most critical security risks against web applications.

Just use safe connections to access components from official sources. To reduce the possibility of a changed, malicious portion being included, prefer signed packages. Since the code usually assumes a definable collection of classes, strict type restrictions should be applied during deserialization before object creation.


An injection vulnerability in a web application allows attackers to send hostile data to an interpreter, causing that data to be compiled and executed on the server. Broken access control means that attackers can gain access to user accounts and act as users or administrators, and that regular users can gain unintended privileged functions.

OWASP Top 10 2017 Update Lessons

And when that sensitive data leaks, that’s when we see those noteworthy breaches. For an injection attack to happen , untrusted data is sent to an interpreter as part of a command or a query.

What Is Owasp?

While 82% of known vulnerabilities are in application code, with 90% of web applications vulnerable to hacking and 68% of those vulnerable to the breach of sensitive data. As a community, we must move beyond “shift left” coding to pre-code tasks that are important to the Secure by Design principles. Any application that accepts parameters as input can be susceptible to injection attacks. The level of the threat is highly correlated with the thoroughness of the application’s input validation measures. Every application developer, regardless of experience level, must make the effort to understand code security vulnerabilities in order to avoid frustrating and often costly application security failures.

This risk occurs when attackers are able to upload or include hostile XML content due to insecure code, integrations, or dependencies. An SCA scan can find risks in third-party components with known vulnerabilities and will warn you about them.

Want Even More Software Development Trends?

However, with the Top 10 relied-on extensively by thousands of professionals and organizations for their vulnerability and security education programmes, changes are bound to be contentious. But often perpetrators will use the technique to gain the information needed to exploit security vulnerabilities and decrypt data.

OWASP Top 10 2017 Update Lessons

The basic idea that I feel the authors are going for here is that an application should have more auditible clarity for both users and its administrators about potential security issues it can make them aware of. The application is unable to detect, escalate, or alert for active attacks in real time or near real time. The OWASP document specifies that it’s possible with at least Java as well. Basic integrity checks and/or keeping the serialized format totally OWASP Top 10 2017 Update Lessons secure is smart. XSS, or cross-site scripting has fallen a good distance in the 2017 revision of the OWASP Top Ten. The reason for this is that it’s so often cited as a security vulnerability, the likelihood of people making mistakes that render their application vulnerable has declined a good deal. What was interesting about it the 2017 update, to me, was that it went through a few different drafts, and finally did some data-analysis and polling.

Be sure that logs are created in a format that automated log management solutions can easily process. Disable all unused dependencies, functions, components, data, or documents.


These functions should not be accessible for other types of visitors. The Open Web Application Security Project is a non-profit global community that strives to promote application security across the web. A core OWASP principle is that their knowledge base is freely and easily accessible on their website.

Since space is limited, the OWASP Top 10 project opted to either drop some risks that were no longer as important or prevalent. Additionally, since the OWASP Top 10 is ordered by the prevalence of risk, some risks have moved rank. Additionally, since the OWASP Top 10 is ordered by prevalence of risk, some risks have moved rank.

GDPR Cookie Consent with Real Cookie Banner