The update server URL of com_joomlaupdate can be manipulated by non Super-Admin users.
Joomla! CMS versions 3.8.13 through 3.9.6
Upgrade to version 3.9.7
The JSST at the Joomla! Security Centre.
The subform fieldtype does not sufficiently filter or validate input of subfields, this leads to XSS attack vectors.
Joomla! CMS versions 3.6.0 through 3.9.6
The CSV export of com_actionslogs is vulnerable to CSV injection.
Joomla! CMS versions 3.9.0 through 3.9.6
In Joomla 3.9.3, the vulnerability of insecure deserialization when executing Phar archives was addressed by removing the known attack vector in the Joomla core. In order to intercept file invocations like file_exists or stat on compromised Phar archives the base name has to be determined and checked before allowing to be handled by PHP Phar stream handling. The used implementation however is vulnerable to path traversal leading to scenarios where the Phar archive to be assessed is not the actual (compromised) file.
Joomla! CMS versions 3.9.3 through 3.9.5
Upgrade to version 3.9.6
The debug views of com_users do not properly escape user supplied data, which leads to a potential XSS attack vector.
Joomla! CMS versions 1.7.0 through 3.9.5