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[Prevention of XPath injection] requires the following characters to be removed (ie, prohibited) or properly escaped:

  • < > / ' = " to prevent straight parameter injection
  • XPath queries should not contain any meta characters (such as ' = * ? // or similar)
  • XSLT expansions should not contain any user input, or if they do, [you should] comprehensively test the existence of the file, and ensure that the files are within the bounds set by the Java 2 Security Policy

Related Guidelines

MITRE 2009CWECWE-643, Failure to sanitize data within XPath expressions (aka "XPath injection")

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