The quite common Linksys WRT54GL v4.x has a serious vulnerability that can be exploited by hackers remotely (i.e., from across the Internet). The vulnerability is Cross Site Request Forgery (CSRF). This is possibly the second most common web vulnerability (second only to Cross Site Scripting aka XSS). Despite its prevalence, CSRF is not well known [...]

OpenID is a very cool authentication idea. It allows you to have single sign-on (i.e., login once using one user name and password for multiple websites/applications) for sites that support OpenID. The ability to only login to one site and then only provide your OpenID URL to other sites you would like to authenticate to [...]