Report the worgen's presence to Executor Zygand at Brill in Tirisfal Glades.
As far as you know, a worgen rogue roaming in Tirisfal is a new development. This is something that Executor Zygand would certainly be interested in.
You will also receive:
- 315 experience
- 85 (or 1 80 if completed at level 90)
- 75 reputation with Undercity