GHSA-JW4X-V69F-HH5W XmlScanner bypass leads to XXE

Summary The XmlScanner class has a scan method which should prevent XXE attacks. However, the regexes used in the scan method and the findCharSet method can be bypassed by using UCS-4 and encoding guessing as described in . Details The scan method converts the input in the UTF-8 encoding if it is...