Cisco: Magic WebEx URL Allows Arbitrary Remote Command Execution
WebEx is the worst conferencing software I've used.
Their Linux support is worst than non-existant. If it were non-existant that would be it, life could go on. But no, they provide a java applet that runs only from firefox, that it's impossible to use audio because they are still at 32bit, that claims to share one application and instead shares your whole screen (and only if you are lucky and someone tells you, you'll ever know), that occasionally (like one hour before an important meeting) they release a version with bad manifests and the applet refuses to download its components.Even their Android client can't manage the mic volume properly and people can't hear you.