Properly validate the incoming post ID, and code which did it different ways. There are various other bits of code that have issues, particularly failure to Get_post, which turns out to be easy to do. Unauthorised user could change any post by forcing the error condition in Permissions check was inadequate, allowing the privilege escalation - i.e. In this case, get_post could return an error value, but this was neverĬhecked for, so the permissions check ends up returning true. (removing irrelevant details, as I will for all the samples in this post): public function update_item_permissions_check( $request ) ![]() In particular, the code looked like the following The primary error was a piece of code that failed to check a returned value to I've used various other languages, and I'm drawn to languages like Haskell and Worked mainly with Python, and I'm a (rather inactive) Django core developer Time ago, or WordPress, especially when it comes to security after PHP I've (Upfront note about my biases: I'm not a fan of PHP, though I used to be a long Lessons can be learned for avoiding this kind of thing in our own projects. It is meant to be constructive - that is, what positive Some of the deeper coding/development process issues behind such a serious I haven't found much by way of deeper analysis, and so this post is my take on The vulnerability was found by Sucuri, and they have detailed the issue on In some cases this can lead to remote code execution, and that has been seen in Since then, hundreds of thousands of unpatched installations have This vulnerability allowed a remote, unauthorised attack to update web pages via ![]() A few weeks ago, WordPress released version 4.7.2 toĪddress several security vulnerabilities, including one critical one.
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