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FlaskBB

Forum software written with Flask

Forums & Community ★ 2.7k stars Medium setup BSD-3-Clause

FlaskBB is a forum software built with the Python Flask framework, providing categories, forums, topics, private messages, and a moderation system. It is lightweight and easy to deploy.

Official siteSource code

Key features

  • Flask-based forum software
  • Private messaging and moderation
  • Lightweight Python deployment

Strengths

  • Released under the BSD-3-Clause license
  • Active community (2.7k GitHub stars)
  • Written in Python
  • Tiny footprint — runs in 256 MB RAM

Is FlaskBB secure?

No known vulnerabilities affect FlaskBB's latest release (v2.2.1). OSV.dev lists 3 past advisories for the project; none of them applies to this release. No known vulnerabilities is not proof of security: it means none have been publicly catalogued.

  • Most recent fixed advisory CVE-2026-46556, published 2026-07-21 (85 days ago), fixed in 2.2.1

Source: OSV.dev, checked 2026-10-14. How this is measured.

FlaskBB replaces

Self-hosted phpBB alternatives

Health badge

Maintain FlaskBB? Add its health score to your README. The badge links back to this page.

SelfHostIndex: 89 · excellent

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[![SelfHostIndex health score for FlaskBB](https://selfhostindex.com/badge/flaskbb.svg)](https://selfhostindex.com/app/flaskbb/)
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<a href="https://selfhostindex.com/app/flaskbb/"><img src="https://selfhostindex.com/badge/flaskbb.svg" alt="SelfHostIndex health score for FlaskBB"></a>
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   :alt: SelfHostIndex health score for FlaskBB
   :target: https://selfhostindex.com/app/flaskbb/

The score is recomputed on every nightly rebuild from public repository data — see how it is calculated.

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