SQL injection might be possible

[jakani24]

Hey just randomly saw your repo, but in the file 'Absenzen.php' on line 59 unserialized user input is added into an SQL statement which might lead to SQL injeciton and full compromise of you db.
Actually every time an SQL query is made the user input does not get serialized...
I don't know if it is important that your db and service is secure but it might interest you.