Yesterday, a not-insignificant exploit in the Steam Community infrastructure was found and subsequently repaired. Amidst the panic and confusion, the developers provided information on the fix and the Steam community broke down exactly what the heck happened. On the r/Steam Reddit community, user DirtDiglett compiled everything anyone would need to know about the exploit and fix into one post. The wild part is the exploit was found in the “My Showcase” profile display option, where players could show off their favorite games, achievements and more.
Fortunately, through the magic of not letting text display verbatim as users entered, the problem was addressed.