Language: Java
Label: vulnerable
CWE: CWE-89 \u2014 Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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.

Code:
    public Object visit(ExcludeFilter filter, Object extraData) {
        append(extraData, "0 = 1 /* EXCLUDE */\n");
        return extraData;
    }