Luna Oraivej, 37, said Court Services Institute failed to ensure her safety in a class she was ordered to attend with others accused of low-level crimes, seattlepi.com reported Sunday.
Police said Oraivej was allegedly stabbed in the shoulder and arm by Faribah Maradiaga, 20, when the two women got into an argument over a video being shown in the class.
The women were in the class because of misdemeanor criminal charges. The charges against Oraivej have since been dismissed.
Maradiaga has been charged with second-degree assault in the stabbing.
In her lawsuit, Oraivej said CSI failed to take precautions to avoid allowing deadly weapons into its anger-management classes.
CSI had not yet responded in court to the lawsuit, seattlepi.com said.