Re: Wordpress Content Text Slider on Post 6.8 - Persistent Vulnerability

[Ryan Dewhurst <ryandewhurst () gmail com>]

The POST request contains a CSRF nonce that is validated by the server and
an administrator user is the only role that is able to use the plugin (at
least by default).

Only an administrator user is able to execute JavaScript using the issue
you described due to the limitations I mentioned above.

An administrator user already has the permission to embed JavaScript and
execute PHP within WordPress as long as they have a valid CSRF nonce.

This is a none issue IMO, although it is recommended that the plugin does
sanitise user input and encode user output. But in its current form I can
not see how this is exploitable.

On Tue, Dec 22, 2015 at 3:58 PM, Vulnerability Lab <
research () vulnerability-lab com> wrote:

> Document Title:
> ===============
> Wordpress Content Text Slider on Post 6.8 - Persistent Vulnerability
>
>
> References (Source):
> ====================
> http://www.vulnerability-lab.com/get_content.php?id=1655
>
>
> Release Date:
> =============
> 2015-12-07
>
>
> Vulnerability Laboratory ID (VL-ID):
> ====================================
> 1655
>
>
> Common Vulnerability Scoring System:
> ====================================
> 3.5
>
>
> Product & Service Introduction:
> ===============================
> Content text slider on post is a WordPress plugin from gopiplus.com
> website. We can use this plugin to scroll the content vertically in the
> posts and pages. We have option to enter content title, description and
> link for the content. All entered details scroll vertically into the
> posts and pages. Yes we can enter the html content into the description
> text area also we can include the images into the scroller.
>
> (Copy of the Vendor Homepage:
> https://wordpress.org/plugins/content-text-slider-on-post/ )
>
>
> Abstract Advisory Information:
> ==============================
> An independent vulnerability laboratory researcher discovered an
> application-side cross site scripting web vulnerability in the Wordpress
> Content Text Slider v6.8 web-application.
>
>
> Vulnerability Disclosure Timeline:
> ==================================
> 2015-12-07:     Public Disclosure (Vulnerability Laboratory)
>
>
> Discovery Status:
> =================
> Published
>
>
> Affected Product(s):
> ====================
> GoPiPlus
> Product: Content Text Slider On Post - Plugin (Web-Application) 6.8
>
>
> Exploitation Technique:
> =======================
> Remote
>
>
> Severity Level:
> ===============
> Medium
>
>
> Technical Details & Description:
> ================================
> An application-side POST inject web vulnerability has been discovered in
> the Wordpress Content Text Slider v6.8 web-application.
> The vulnerability allows remote attackers to inject own malicious script
> codes to the application-side of the online-service.
>
> The vulnerability is located in the `page` value parameter of the
> `options-general.php` file. Remote attackers are able to inject
> via POST method request to the `Title` or `Message/Content` input fields.
> After that the attacker is able to execute the code by
> usage of the insert details button. The execution of the malicious
> injected script code occurs in the `All popups` module when
> processing to request manually. An attacker is able to steal the admin
> cookie by usage of a moderator account. The attack vector
> is persistent on the application-side and the request method to inject is
> POST.
>
> The security risk of the application-side web vulnerability is estimated
> as medium with a cvss (common vulnerability scoring system) count of 3.5.
> Exploitation of the application-side web vulnerability requires no
> privilege web-application user account and only low or medium user
> interaction.
> Successful exploitation of the vulnerabilities results in persistent
> phishing, session hijacking, persistent external redirect to malicious
> sources and application-side manipulation of affected or connected module
> context.
>
> Request Method(s):
>                                 [+] POST
> Vulnerable File(s):
>                                 [+] options-general.php
> Vulnerable Module(s):
>                                 [+] Title or Message/Content
> Vulnerable Parameter(s):
>                                 [+] page
> Affected Module(s):
>                                 [+] All popups
>
>
> Proof of Concept (PoC):
> =======================
> The vulnerbaility can be exploited by remote attackers without privilege
> web-application user account and low or medium user interaction.
> For security demonstration or to reproduce the vulnerability follow the
> provided information and steps below to continue.
>
> Google Dork: inurl:/wp-content/plugins/content-text-slider-on-post/
>
> Manual steps to reproduce the vulnerability ...
> 1. First you should Install content text slider on post
> 2. Add the following details as link
> Note:
> http://localhost:8080/wp-admin/options-general.php?page=content-text-slider-on-post&ac=add
> 3. In the "Title" or "Message/Content" text area you can input place your
> javascript code and click on "insert detail" button
> 4. Execute the javascript codes in the "All popups" page
> Note:
> http://localhost:8080/wp-admin/options-general.php?page=content-text-slider-on-post
> 5. Successful reproduce of the vulnerability!
>
> Note: Attackers can steal admin cookie with moderator access to compromise
> the account system of the wordpress application and connected dbms.
>
>
> Security Risk:
> ==============
> The security risk of the persistent POST Inject web vulnerability in the
> wordpress content text slider module is estimated as medium. (CVSS 3.5)
>
>
> Credits & Authors:
> ==================
> ALIREZA_PROMIS
> Special Thanks : Sajjad Sotoudeh [Forum: http://iransec.net/forums]
> Friends: Mr.Moein  , sheytan azzam , Mr.PERSIA  , HellBoy.Blackhat, Jok3r
> ,  Kamran Helish ,  Dr.RooT
>
>
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> =========================
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