Verifying Releases

Each package is published with information that help confirm it was downloaded correctly and was published by the MyBB Team. Learn how to verify the integrity and authenticity of MyBB packages.

Latest Version Information

Guarantee of latest updates

Make sure to obtain the software packages from official sources. The Download page always shows the most recent available version, and the MyBB Blog contains official announcements related to the Project.

You can get notified of updates by:

subscribing to the MyBB Blog (Releases RSS feed, Security RSS feed),
following @[email protected] on Mastodon (all releases),
following @mybbsecurity on Twitter (security-related releases),
following @mybb on Twitter (all releases),
checking for updates in your Admin Control Panel’s Home.

Links to latest Release Blog Posts are also pinned in the #18-support channel on our Discord server.

Additionally, we recommend subscribing to used plugins and themes on the Extend section to get notified of extension updates.

Checksums

Integrity of downloaded packages

Checksums are short chunks of text which can verify that files were downloaded correctly. MyBB publishes checksums generated by SHA-512, SHA-256, SHA-1 and MD5 hash algorithms (strongest to weakest — checking SHA-512 is recommended).

After downloading the package, its checksum should be compared to the one that was published.

Linux — Terminal
```
sha512sum filename.zip
```
Mac OS X — Terminal
```
shasum --algorithm 512 filename.zip
```
Windows — Command Prompt
```
CertUtil -hashfile filename.zip SHA512
```

Windows — PowerShell

Get-FileHash filename.zip -Algorithm SHA512 | Format-List

Reproducibility

Tracing the packaging process

Distributed packages (mybb_*.zip, changed_files_*.zip) can be reproduced using:

the build script, and
build_*.zip archives on the Releases page on GitHub, which include input for the script (input/):
- references to the MyBB source code repository at a specific state to pull the code from,
- security patches (.diff format),
- metadata.

The generated packages (output/) should be binary-identical to published packages.

If you encounter discrepancies or notice suspicious content in any of the packages, contact the MyBB Security Team.