A young woman who was ejaculated onto by a stranger at the St Kilda Festival has spoken of her anger towards men following the incident and her fears of future attacks on women.

The victim, identified only as Emma, 20, said she believed the incident could have been much more serious.

A computer-generated image of the man wanted over an indecent assault at St Kilda Festival. Credit:Victoria Police

"I'm pretty happy that it wasn't worse, pretty angry, and pretty angry towards men," she said.

"It's a bit traumatising, I just want to catch him so that nothing like that can happen to someone else or something worse because I feel like it could have been a lot worse in a less public setting."