Re:#1 CSRF Is A Vulnerability In All Browsers
by citricsquid on Friday March 30, 2012 @06:13PM
(#3778382)
I can link someone to a page and it can associate them with something they can then never disassociate themselves with. For example I could create an account, post illegal content (child pornography etc.) on the site then get people to click a link and forcibly associate their account with that content, which they are then tied to until a site administrator realises and fixes it. (edit: without them ever knowing)
Imagine if I could make you the author of this comment, it's like that.
It's persistent if it can be saved in a comment or on a profile, etc, and is much more dangerous if so. Non-persistent XSS realistically isn't too big a deal, most sites are vulnerable and it's usually only a problem if you're a big website and therefore vulnerable to phishing attacks.