Why has my website gone from 2 duplicate pages to 5000+ duplicate pages n 1 week?

[Stubs]

Hi Can anyone please help.

Using the weekly moz reports I realised that my website has gone from 2 duplicate pages to over 5000. As well as this pages with "too long URL" has jumped to over 5000 as well as missing meta tags.

Any help would be greatly appreciated!

Cheers

[CustomButtonCo.com]

What CMS are you using?  Could be a problem with a plugin or code.

[Stubs]

Thanks for replying!

I am using a wordpress CMS, however I cannot think of any plugins or anything that I have added over the past couple weeks. Do you know a way to check?

Thans again

[CustomButtonCo.com]

The duplicate content issue you can easily solve by installing Yoast SEO plugin and noindexing the tag pages (you can also noindex categories, archives etc if you need).

Here is a great guide to stetting up the plugin properly and eliminating those page duplication errors http://moz.com/blog/setup-wordpress-for-seo-success

Hope this helps!

[KeriMorgret]

Download the CSV report and take a look at the URLs to see if they offer a clue. It could be that suddenly there's new pagination or session IDs that are being indexed.