Cash and Digne were hit by Buendia after Villa's goal.
A bottle was thrown from the crowd at the game and hit Lucas Digne and Matty Cash.
The bottle was thrown as Villa celebrated Buendia's goal.
The two players stayed on the floor for a short time before being able to continue.
Digne asked to leave and joined Villa two weeks later.
You can follow the action on Saturday.
Digne wrote in a post on the social media site that he was sad because of what had happened.
I won't enter a war on words with anyone.
According to the UK's football policing lead, arrests at football matches across the top five English leagues are at their highest levels in years.
The return of fans to capacity stadiums after a year of restrictions has been covered in the latest data.
There have been more than 800 football-related arrests in the first six months of the campaign.
The build-up to the game at Goodison Park had been emotionally charged, with Duncan Ferguson taking interim charge of the team.
A plane carrying a banner reading "22 years of failure Bill" was seen before the game.
Anger among fans has been building since a run of one win in 13 league games before the visit of Villa.
A plane flew over the ground before the game, calling for the resignation of chairman Bill Kenwright, who has been associated with the club for more than 20 years.
At the beginning of January, a bottle was thrown at a goal at Elland Road, hitting Matt Lowton, who was celebrating with his teammates.
It needs to be a lifetime ban for anyone caught doing it. "It's dangerous," said former Republic of Ireland international Andy Reid.
If it's a coin, you could cause real damage. You could hurt someone if you put a full bottle with a lid in there.
It's a disgrace to see things thrown from the crowd.
It should not happen. A player shouldn't be hit by objects thrown from the crowd.
Ezi Konsa took a sip from the bottle.
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