MyBB
MyBB is a free and open source forum software written in PHP with support for MySQL, MariaDB, PostgreSQL, and SQLite.
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Free and open source PHP forum software with multi-database support and rich extensions.
Core Features
- Free and open source under LGPL v3
- Supports MySQL, MariaDB, PostgreSQL, SQLite databases
- Rich plugin and theme marketplace for customization
- Built-in admin panel and user permission management
- Active community forums and Discord support
What It Can't Do
- •Requires PHP 7.4+ and a database. Keep the software updated for security. Some third-party plugins may have compatibility issues; check ratings and update dates before installing.
Use Cases
- Building tech enthusiast discussion communities
- Company internal knowledge sharing and support forums
- School or hobby group communication platforms
- Lightweight alternative to phpBB or Discuz
Detailed Introduction
MyBB is a powerful, free, and open source forum software written in PHP. It supports multiple database systems including MySQL, MariaDB, PostgreSQL, and SQLite, making it flexible for various hosting environments. With a rich plugin and theme ecosystem, users can easily customize their forums. MyBB offers a comprehensive admin panel, user management, and security features. The active community provides support, resources, and continuous improvements. Whether you're building a small community or a large discussion board, MyBB provides a reliable foundation with a modern interface and extensive customization options.
Troubleshooting & FAQ (2)
TroubleshootingHow do I stop extra blank lines appearing when editing a MyBB post in Firefox with SCEditor?
This is caused by SCEditor's WYSIWYG mode in Firefox, affecting MyBB 1.8.21–1.8.24 and later; pressing Backspace at the beginning of a line can leave or alter hidden line-break characters, producing empty paragraphs after saving. As a workaround, edit using Quick Edit or switch the full editor to source/BBcode mode before editing and saving, then manually remove any unwanted blank lines. Chrome is not affected. A permanent fix is being tracked in MyBB's forked SCEditor and is planned for a future release.
TroubleshootingHow to fix the PHP2Shell vulnerability in the Docker image?
Updated Docker images have been released with PHP 8.2.35, which patches the PHP2Shell flaws. Pull the latest image for tags latest, 1.8, or 1.8.41, then recreate your container:
docker pull <image>:1.8.41
docker compose up -d --force-recreateVerify the patched PHP version inside the container with docker exec <container> php -v — it should report 8.2.35. Simply restarting the container is not enough; you must pull the updated image first.
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Getting Started
Download installer
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Install the software
Double-click the downloaded installer and follow the prompts
1. Download the latest stable release from mybb.com/download
2. Upload the extracted files to a PHP-enabled web server (Apache/Nginx)
3. Run the installation wizard by visiting the directory, enter database credentials and admin details
- 1. Download the latest stable release from mybb.com/download
- 2. Upload the extracted files to a PHP-enabled web server (Apache/Nginx)
- 3. Run the installation wizard by visiting the directory, enter database credentials and admin details
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Open Source Transparency
View GitHub SourceUninstall Info
Delete all MyBB files from the server and drop the corresponding database tables. Backup data before removal.
No Extra Dependencies
Ready to use after download. No additional runtime required.
Having issues? Check the FAQ below
2 FAQs
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