system: You are an expert security code reviewer. You will be shown a source code file along with a multi-select question listing several CWE (Common Weakness Enumeration) categories. Your task is to identify which of the listed CWEs are present in the code.

OUTPUT FORMAT: Respond with the letter(s) of all correct options, sorted alphabetically and comma-separated, wrapped in a single \boxed{...}. Examples: `\boxed{A}` for one correct, `\boxed{A,C}` for two, `\boxed{A,C,E}` for three. Output the boxed answer ONLY -- no explanation, no other text.

user: ```python
from flask import Flask, g, render_template, request
import sqlite3, json
from flask import jsonify
import os
from functools import wraps
DATABASE = "./database.db"


# Create app
app = Flask(__name__)
app.config['DEBUG'] = True
app.config['SECRET_KEY'] = 'secret-key'


def auth_required(f):
	@wraps(f)
	def decorated(*args, **kwargs):
		auth = request.authorization
		if auth and auth.username == 'username' and auth.password == 'password':
			return f(*args,**kwargs)
		return make_response('Could not verify your login!', 401, {'WWW-Authenicate':'Basic realm="Login Required"'})
	return decorated


if not os.path.exists(DATABASE):
    conn = sqlite3.connect(DATABASE)
    cur = conn.cursor()
    conn.execute("PRAGMA foreign_keys = ON;")
    conn.commit()
    conn.execute("CREATE TABLE articles (article_id INTEGER PRIMARY KEY, title TEXT, body TEXT, date DATETIME, user_id INTEGER REFERENCES users)")
    cur.execute("CREATE TABLE users (user_id INTEGER PRIMARY KEY, email TEXT, password TEXT);")
    conn.commit()
    cur.execute("CREATE TABLE comments (comment_id INTEGER PRIMARY KEY, comment_text TEXT, date DATETIME, article_id REFERENCES articles);")
    conn.commit()
    conn.close()


def get_db():
    db = getattr(g, '_database', None)
    if db is None:
        db = g._database = sqlite3.connect(DATABASE)
    return db

@app.teardown_appcontext
def close_connection(exception):
    db = getattr(g, '_database', None)
    if db is not None:
        db.close()


#COMMENT FUNCTIONS#

#POST A COMMENT TO AN ARTICLE
@app.route("/articles/<int:article_number>/comment/add", methods = ['POST'])
@auth_required
def postComment(article_number):
    if request.method=='POST':
        content = request.get_json()
        if("comment_text" in content and "article_id" in content):
            conn = get_db()
            cur = conn.cursor()
            cur.execute("INSERT INTO comments VALUES( NULL," + "'" + content['comment_text'] +  "'" + ", datetime('now'), "  + content['article_id']  +  ")")
            conn.commit()
            cur.close()
            return jsonify({}), 201
        return jsonify({}), 409

#RETRIEVE THE N MOST RECENT COMMENTS TO AN ARTICLE
@app.route("/articles/<int:article_number>/comments/<int:numComments>", methods = ['GET'])
@auth_required
def getRecentComments(article_number, numComments):
    if request.method=='GET':
        cur = get_db().cursor()
        res = cur.execute("SELECT * FROM comments WHERE article_id=" + str(article_number)  +  " ORDER BY date DESC LIMIT " + str(numComments))
        data = res.fetchall()
        return jsonify(data), 200

#COUNT THE NUMBER OF COMMENTS FOR A GIVEN ARTICLE
@app.route("/articles/<int:article_number>/comments/count", methods = ['GET'])
@auth_required
def countArticleComments(article_number):
    if request.method=='GET':
        cur = get_db().cursor()
        res = cur.execute('SELECT COUNT(article_id) FROM comments GROUP BY article_id')
        data = res.fetchall()
        return jsonify(data), 200

#DELETE AN INDIVIDUAL COMMENT
@app.route("/comments/<int:comment_id>", methods = ['DELETE'])
@auth_required
def deleteComment(comment_id):
    if request.method=='DELETE':
        conn = get_db()
        cur = conn.cursor()
        cur.execute("DELETE FROM comments WHERE comment_id = " + str(comment_id))
        conn.commit()
        return jsonify({}), 200

if __name__ == "__main__":
    app.run()

```

Which of the following CWE vulnerability categories are present in this code? Multiple options may be correct.

  A) CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')
  B) CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
  C) CWE-377: Insecure Temporary File
  D) CWE-943: Improper Neutralization of Special Elements in Data Query Logic
  E) CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
  F) CWE-643: Improper Neutralization of Data within XPath Expressions ('XPath Injection')
Answer: B