A prominent Queensland anti-corruption campaigner has been hospitalised after an attack on Sunday afternoon.

Jim Dodrill​, 52, suffered multiple injuries after agreeing to meet a stranger who had asked for his help.

Jim Dodrill after the attack on Sunday.

Mr Dodrill said he had gone to meet the man, who had earlier approached him as he was leaving Riverview Catholic church on Sunday morning.

The man led him to a secluded dirt road, where he was assaulted by several men. His 72-year-old father Mitch was also injured during the attack.