I have an E-commerce site (built on OpenCart 22.214.171.124). I'm using an SEO pack plugin that keeps a list of 404 errors, so we can make redirects.
As of a couple of weeks ago, I keep seeing a LOT of 404s that don't even look like links:
999999.9 //uNiOn//aLl /**/sElEcT 0x393133353134353632312e39
999999.9 //uNiOn//aLl /**/sElEcT 0x393133353134353632312e39,0x393133353134353632322e39
999999.9 //uNiOn//aLl /**/sElEcT 0x393133353134353632312e39,0x393133353134353632322e39,0x393133353134353632332e39
- ...and so on, until it reaches:
999999.9" //uNiOn//aLl /**/sElEcT 0x393133353134353632312e39,0x393133353134353632322e39,0x393133353134353632332e39,0x393133353134353632342e39,0x393133353134353632352e39,0x393133353134353632362e39,0x393133353134353632372e39,0x393133353134353632382e39,0x393133353134353632392e39,0x39313335313435363231302e39,0x3931
This isn't happening once, but 30-50 times per example. Over 1600 lines of this mess in the latest 404s report.
Now, I know how to make redirects for "normal" broken links, but I don't even know where to begin to fix this.