Sunday, August 20, 2017
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New MyBB POST XSS Zero-day

Osanda Malith, an independent security researcher has released his new findings in a blog post yesterday.  He demonstrated a newly found zero-day that allows an attacker to inject code into Mybb’s search.php file via a POST XSS exploit.

In the blog post, he writes “This is a weird bug I found in MyBB. I fuzzed the input of the search.php file. This was my input given.”

After injection, Mybb spits out a SQL error:

finalerror

You can view the POC video here:

You can get the POC script here:

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