Missing input validation within the template manager.
Joomla! CMS versions 3.2.0 - 3.9.24
Upgrade to version 3.9.25
The JSST at the Joomla! Security Centre.
Usage of the insecure rand() function within the process of generating the 2FA secret.
Usage of an insufficient length for the 2FA secret accoring to RFC 4226 of 10 bytes vs 20 bytes.
Additional details as well as a more contexts for exising sites can be found in the docs: https://docs.joomla.org/J3.x:Changes_to_the_2FA_token_generation_recommendations_for_existing_sites
This issue has been coordinated with Akeeba Ltd as contributor of the original FOF codebase to the core.
Joomla! CMS versions 3.2.0 - 3.9.24
Upgrade to version 3.9.25
The JSST at the Joomla! Security Centre.
The core shipped but unused randval implementation within FOF (FOFEncryptRandval) used an potential insecure implemetation. That has now been replaced with a call to "random_bytes()" and its backport that is shipped within random_compat.
This issue has been coordinated with Akeeba Ltd as contributor of the original FOF codebase to the core.
Joomla! CMS versions 3.2.0 - 3.9.24
Upgrade to version 3.9.25
The JSST at the Joomla! Security Centre.
Missing filtering of messages showed to users that could lead to xss issues.
Joomla! CMS versions 2.5.0 - 3.9.24
Upgrade to version 3.9.25
The JSST at the Joomla! Security Centre.
Extracting an specifilcy crafted zip package could write files outside of the intended path.
Joomla! CMS versions 3.0.0 - 3.9.24
Upgrade to version 3.9.25
The JSST at the Joomla! Security Centre.