The worker was transferred to hospital for treatment.
Israeli police are searching for the suspect, who fled the scene of the attack.
Anti-Palestinian attacks in Israel are frequent and often involve the desecration of holy sites in addition to physical assaults.
In February, suspected Jewish extremists set fire to part of a Christian seminary in East Jerusalem’s Old City and sprayed “Jesus is a son of a whore” and “Redemption of Zion” on the walls.
A day earlier, extremist Jewish settlers set fire to a mosque in the southern West Bank town of al-Jaba and sprayed racist slogans calling for killing Arabs and Muslims on the walls in Hebrew.