Every piece of software your organisation runs is a potential entry point. Application security is the practice of identifying and addressing vulnerabilities across the full software lifecycle from the moment code is written, through testing and deployment, to the systems running in production. 

According to a 2024 academic study on web attack trends, SQL injection remains the most frequent threat to web applications. SQL injection occurs when attackers insert malicious code into input fields, such as login forms or search bars, to manipulate the underlying database and extract or corrupt sensitive data. It’s one of the oldest known attack types. The same study shows defacement and malware attacks are on the rise, while account hijacking and DDoS attacks remain consistently prevalent.

Even with strong habits, gaps remain. Static Application Security Testing (SAST) reviews source code for known vulnerability patterns, while Software Composition Analysis (SCA) tracks risks in third-party dependencies. 

When integrated into CI/CD pipelines, these tools give teams clear insights into potential risks, supporting secure coding throughout the development lifecycle.

Separate your environments  
Development, testing, staging, and production should operate in isolation, each with its own access controls and configuration. When they bleed into one another, untested code can reach live systems and sensitive data can be exposed. 

Segregate responsibilities  
The person writing the code shouldn’t be the one deploying it. System administrators should oversee migrations between environments, ensuring developers only have the access their role requires. Embedding this into a DevSecOps model means each team owns their security checks from the start, not as a final step. 

Test for security throughout QA 
Secure code reviews, authorisation checks, and dynamic application security testing (DAST) should be part of every QA cycle. Automated tools provide continuous coverage. Manual penetration testing by experienced professionals should complement them at least every six months to catch what automation misses.

Organisations that embed application security from the start are better positioned against threats that continue to evolve. In regulated industries, this approach to secure development is increasingly expected by clients and auditors. 

MDRme’s security testing and IT consultancy services help businesses identify gaps in their software development and deployment practices and build the right foundations to address them.