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Serendipity

PHP-powered weblog application with strong spam control

Blogging Platforms ★ 228 stars Easy setup BSD-3-Clause

Serendipity is an open-source PHP and MySQL-powered weblog application that emphasizes ease of use and effective spam protection. It supports plugins, themes, and multiple blogs.

Official siteSource code

Key features

  • Strong built-in spam protection
  • Plugin and theme system
  • Multiple blog support
  • Easy upgrades

Pros & cons

Strengths

  • Excellent spam handling
  • Stable long-running project

Trade-offs

  • Small modern community
  • Dated default themes

Is Serendipity secure?

No known vulnerabilities affect Serendipity's latest release (2.6.1). OSV.dev lists 23 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-2026-73629, published 2026-08-13 (62 days ago), fixed in 2.6.0

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

Serendipity replaces

Self-hosted WordPress alternativesSelf-hosted Blogger alternatives

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SelfHostIndex: 80 · excellent

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