twbs/bootstrap

vv5.3.3
Original

Bootstrap is the original and most widely used front-end framework for responsive web development.

MIT+1
9(100% fixed)
95%

About

Bootstrap is an open-source CSS framework that has fundamentally shaped how developers approach front-end design. Its mobile-first approach and comprehensive grid system empower developers to craft responsive sites seamlessly across a range of devices. As the most popular front-end framework, Bootstrap has seen extensive adoption across various industries, from small startups to large enterprises, seeking to enhance their web presence without compromising performance. The rich library of pre-designed components, such as navigation bars, forms, and buttons, accelerates development time and enables developers to focus more on functionality rather than design minutiae. With an active user community, Bootstrap continually evolves through contributions, ensuring it meets modern web standards. Given its widespread use, many large companies integrate Bootstrap into their tech stacks, making it a trusted choice for building professional web applications. Additionally, given its user-friendly nature, Bootstrap serves as a great introduction for beginners learning web development, further solidifying its status in the developer community.

License Information

MIT(+1 other license found)

Authors

Mark Otto
Jacob Thornton

Pulse

Active
Original
95% popularity

Developers appreciate Bootstrap for its robust documentation and vibrant community, often highlighting its extensive component library and flexibility. However, some express concerns about the prevalence of Bootstrap-styled sites, advocating for more bespoke approaches to design.

Pros & Cons

Pros

  • Strong community support and extensive documentation.
  • Rapid prototyping with a wide variety of components.
  • Responsive design out-of-the-box.
  • Open-source and free to use.
  • Consistent updates and active maintenance.

Cons

  • Commonly results in sites that look similar due to its design defaults.
  • Can be heavy if not optimized correctly, affecting load times.
  • Might require adjustment for advanced custom designs.
  • May lead to developers relying too heavily on components rather than custom solutions.
  • Somewhat steep learning curve for absolute beginners without prior CSS knowledge.

Future Outlook

As web development continues to evolve, Bootstrap is likely to adapt to emerging front-end technologies, such as the increasing integration of JavaScript frameworks like React and Vue. Future iterations may focus on enhancing performance and customization while remaining easy to use. With an ever-growing emphasis on user experience and design consistency, Bootstrap is poised to remain a staple in the web development toolkit for years to come, potentially expanding its offerings to include more advanced components and better integration with modern frameworks.
Last updated: 12/6/2025

Security Bulletin

Total: 9
Fixed: 9
Active: 0
9
Total Vulnerabilities
0
Critical + High
9
Medium

Vulnerability FiltersAll

SeverityVulnerability
medium
CVE-2024-6484A vulnerability has been identified in Bootstrap that exposes users to Cross-Site Scripting (XSS) at...
CWE-79
medium
CVE-2018-20677In Bootstrap before 3.4.0, XSS is possible in the affix configuration target property.
CWE-79
medium
CVE-2018-14041In Bootstrap before 4.1.2, XSS is possible in the data-target property of scrollspy.
CWE-79
medium
CVE-2018-14040In Bootstrap before 4.1.2, XSS is possible in the collapse data-parent attribute.
CWE-79
medium
CVE-2024-6531A vulnerability has been identified in Bootstrap that exposes users to Cross-Site Scripting (XSS) at...
CWE-79
medium
CVE-2018-20676In Bootstrap before 3.4.0, XSS is possible in the tooltip data-viewport attribute.
CWE-79
medium
CVE-2019-8331In Bootstrap before 3.4.1 and 4.3.x before 4.3.1, XSS is possible in the tooltip or popover data-tem...
CWE-79
medium
CVE-2016-10735In Bootstrap 3.x before 3.4.0 and 4.x-beta before 4.0.0-beta.2, XSS is possible in the data-target a...
CWE-79
medium
CVE-2018-14042In Bootstrap before 4.1.2, XSS is possible in the data-container property of tooltip.
CWE-79