Drupal Security Team reports:
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Arbitrary PHP code execution
A bug in the installer code was identified that allows an attacker
to re-install Drupal using an external database server under certain
transient conditions. This could allow the attacker to execute
arbitrary PHP code on the original server.
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Information disclosure - OpenID module
For sites using the core OpenID module, an information disclosure
vulnerability was identified that allows an attacker to read files
on the local filesystem by attempting to log in to the site using a
malicious OpenID server.