SIMPLE.ERP is vulnerable to the SQL Injection in search functionality in "Obroty na kontach" window. Lack of input validation allows an authenticated attacker to prepare a malicious query to the database that will be executed.
This issue was fixed in 6.30@A04.4_u06.
Improper Neutralization of Special Elements used in an SQL Command The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data.