From time to time a vulnerability in a plugin is disclosed without the discoverer putting out a complete report on the vulnerability and we will put out a post detailing the vulnerability so that we can provide our customers with more complete information on the vulnerability.
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In reviewing reports of vulnerabilities in WordPress plugins we often find that there are reports for things that don’t appear to be vulnerabilities. For more problematic reports we release posts detailing why the vulnerability reports are false, but there have been a lot of that we haven’t felt rose to that level. In particular are items that are not outright false, just the issue is probably more accurately described as a bug. For those that don’t rise to level of getting their own post we now place them in a weekly post when we come across them.
This week there were a couple of reports of claimed persistent cross-site scripting (XSS) vulnerabilities in WordPress File Upload that were supposed to have been fixed in version 4.3.3 and 4.3.4. For both of them, the proof of concept indicated that the claimed vulnerability would be exploited when logged in to WordPress. In testing things out it looked to us that you would need to be logged in as an Administrator to access them. That was confirmed by looking at the code. The page on which the issues occurred through is only accessible in the admin area of WordPress if the user has the “manage_options” capability: [Read more]