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CVE-2021-21707 PoC — Special characters break path parsing in XML functions

Source
https://github.com/useru1k/php-8.1.0-dev-exploit
Associated Vulnerability
Title:Special characters break path parsing in XML functions (CVE-2021-21707)
Description:In PHP versions 7.3.x below 7.3.33, 7.4.x below 7.4.26 and 8.0.x below 8.0.13, certain XML parsing functions, like simplexml_load_file(), URL-decode the filename passed to them. If that filename contains URL-encoded NUL character, this may cause the function to interpret this as the end of the filename, thus interpreting the filename differently from what the user intended, which may lead it to reading a different file than intended.
Description
Exploit for the PHP 8.1.0-dev backdoor vulnerability (CVE-2021-21707)
Readme
# php-8.1-dev-Exploit
File Snapshot

 [4.0K]  /data/pocs/b0d8f552c6e02e044a78c87998619c133b74c366
├── [1.5K]  PhpReverseShell81.java
└── [  21]  README.md

0 directories, 2 files
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