Suspicious 404 Errors

Mike Bilz asked on October 19, 2017 20:48

Hello Everyone,

This may not be a Kentico question specifically, but I'd still appreciate your input.

Recently I've noticed a strange recurring item in the 404 Error reports on my website.

There are numerous failed attempts to access pages ending in “/).html(

So my Invalid Page Report is full of links like:



Has anyone seen this before? My assumption is that this is some type of low level hacking attempt, but I haven’t had much luck looking up this specific issue online.

I'm not sure If I've ever come across this on any other site I've managed, so I was wondering if it might be a Kentico specific issue?

Thanks in advance.


Recent Answers

Brenden Kehren answered on October 19, 2017 21:06

Look at the agent making the call, could be a bot or a hacker. Could also be some bad HTML entered on a page too.

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David te Kloese answered on October 20, 2017 12:13

Are you using the '.html'-extension in your site?

If not it might be a crawler/bot, as Brenden mentioned look at the agent in the eventlog details.

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