Security Issues in Popular Full-Stack Frameworks (Next.js, React, Vue, Angular)

Introduction

Next.js (Vercel), React, Vue, and Angular are the dominant full-stack frameworks in JavaScript and TypeScript. They speed up development but introduce recurring security weaknesses. For product security teams, these weaknesses have been exploited in production and must be addressed at the application level.

DOM Clobbering in React and Vue

DOM clobbering occurs when malicious elements override JavaScript variables by using crafted id or name attributes. In React and Vue, attackers have injected hidden inputs like <input name="location">, which overwrote trusted variables and altered execution flow. This attack escalates privileges inside the client runtime without touching server-side code.

Cross-Site Scripting in Next.js

Next.js server-side rendering amplifies XSS risk. In several reported cases, unescaped user input rendered on the server reached the client intact. Attackers injected <script> payloads into templates, which executed in the browser, stealing cookies and session tokens. Because the injection originates server-side, client-side sanitizers provide no protection.

Angular Template Injection

Older Angular applications remain vulnerable to template injection. Attackers craft expressions that evaluate inside Angular’s templating engine. In real incidents, untrusted bindings allowed execution of JavaScript payloads within the browser context. Newer Angular releases improved sanitization, but legacy codebases still run affected versions.

Dependency Abuse in UI Components

Frameworks often import third-party UI packages. Abandoned components have led to direct compromise. One Vue date-picker library contained an unpatched XSS flaw for years. Production applications embedding it were exploitable until the component was replaced. Studies show that more than one-third of web applications run outdated JavaScript libraries with known CVEs.

Build-Time Exploits in Angular and Next.js

Build systems are often overlooked. Next.js and Angular plugins execute arbitrary code during builds. A malicious plugin was observed injecting backdoors into production bundles during CI/CD. Developers assumed builds were passive, but in practice they executed untrusted code with privileged access.

Application Security Defenses

Security teams should apply layered defenses:

• Sanitize attributes to prevent DOM clobbering.
  
• Escape all server-rendered data in Next.js.
  
• Replace abandoned third-party components.
  
• Monitor build pipelines for unexpected outbound calls.

MITRE ATT&CK Mapping

Conclusion

Next.js, React, Vue, and Angular are not secure by default. They introduce exploitable weaknesses ranging from DOM clobbering and XSS to dependency compromise and build pipeline abuse. These issues have been proven in real-world applications. Security teams must implement continuous runtime monitoring and treat full-stack frameworks as critical application infrastructure rather than assuming defaults are safe.

References

• Wikipedia contributors. (n.d.). DOM clobbering. Wikipedia. https://en.wikipedia.org/wiki/DOM_clobbering
  
• Wikipedia contributors. (n.d.). Cross-site scripting. Wikipedia. https://en.wikipedia.org/wiki/Cross-site_scripting
  
• Lauinger, T., Chaabane, A., Arshad, S., Robertson, W., Wilson, C., & Kirda, E. (2018). Thou Shalt Not Depend on Me: Analysing the Use of Outdated JavaScript Libraries on the Web. arXiv. https://arxiv.org/abs/1811.00918
  
• Zahan, N., Zimmermann, T., Godefroid, P., Murphy, B., Maddila, C., & Williams, L. (2021). What are Weak Links in the npm Supply Chain? arXiv. https://arxiv.org/abs/2112.10165