Twenty Year Anniversary

WordPress Yoast SEO Cross Site Scripting

WordPress Yoast SEO Cross Site Scripting
Posted Aug 4, 2016
Authored by Hammad Shamsi

WordPress Yoast SEO plugin versions prior to 3.4.1 suffer from a stored cross site scripting vulnerability.

tags | exploit, xss
MD5 | 99a8d63a16620294f7c4403248c92fa5

WordPress Yoast SEO Cross Site Scripting

Change Mirror Download
#Vulnerability: Stored XSS Vulnerability in Yoast SEO Plugin
#Impact: High
#Authors: Hammad Shamsi
#Company: RHAinfoSEC
#Website: http://rafayhackingarticles.net & http://blog.sh3ifu.com/

*Introduction*

Yoast SEO (formerly known as WordPress SEO by Yoast) is the most complete WordPress SEO plugin that exists today for WordPress.org users. It incorporates everything from a snippet editor and real time page analysis functionality that helps you optimize your pages content, images titles, meta descriptions and more to XML sitemaps, and loads of optimization options in between.


*Proof Of Concept*

A stored XSS scripting vulnerability was discovered in Yoast SEO plugin for wordpress. The plugin had built-in blacklist filters which were blacklisting Parathesis as well as several functions such as alert. The following POC bypassed:

<img src="z" onerror="prompt&#40document.cookie&#41">

*Impact*

The impact of this vulnerability is moderate as in order to trigger this vulnerability, the attacker must have guest author priviledges. This is dangerous especially in case of news related blogs where anyone is allowed to create a guest account and post articles for review.


*Remediation*

All user supplied input must be sanitized before it is reflected inside the application response.

Blacklist must be avoided, instead focus should be made on secure coding.

This issue is fixed on 3.4.1 Version on Yoast SEO Plugin
https://wordpress.org/plugins/wordpress-seo/changelog/

Comments

RSS Feed Subscribe to this comment feed

No comments yet, be the first!

Login or Register to post a comment

File Archive:

September 2018

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

Top Authors In Last 30 Days

File Tags

Systems

packet storm

© 2018 Packet Storm. All rights reserved.

Services
Security Services
Hosting By
Rokasec
close