It was found that wkhtmltopdf, a command line utility to render HTML files into PDF, allowed local filesystem access by default. This update disables local filesystem access, but it can be enabled if necessary with the --enable-local-file-access or the --allow options.
The Apache Xalan Java XSLT library is vulnerable to an integer truncation issue when processing malicious XSLT stylesheets. This can be used to corrupt Java class files generated by the internal XSLTC compiler and execute arbitrary Java bytecode. In Debian the vulnerable code is in the bcel source package.