A Curseborn character is someone who has been unfortunate enough to be the victim of an outsider's displeasure. Maybe their mother made a deal that she failed to uphold, maybe it's a generational thing. No matter what caused it, curseborn carry this mark around for as long as they live, which is quite a while.
Curseborn can be of any alignment. Some try to attone for whatever cause them to be curseborn, while others rage at the world that let it happen.
Double Age Category limits, except for maturity (Ex. a human curseborn reaches middle age at 70, Old age at 140, Venerable at 140, and has a maximum age of 140 + 4d20)
+2 to two stats, one of the player's choice, and one of the DM's choice. These must be different stats. If this template is applied to an NPC, the DM chooses twice.
-4 to one stat, DM's Choice
+1 on Fortitude Saves
+2 on Will Saves
+2 on Use Magic Device and Spellcraft, both are always class skills
+4 racial bonus vs. bestow curse
and variants thereof