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
"""
web cam controller for tracking slime molds
University of Applied Sciences Potsdam (Germany) @idpotsdam
author: fabiantheblind
license: MIT
"""

import sys # we need this to exit if the GPIO lib is not present
import time # just for testing purpose
import datetime # for timestamps
import os # for path checking
import subprocess # for calling the fswebcam


# change these if you like
IMAGEFOLDER = "/home/pi/fhp/images/"
IMAGENAME = "slime"

# leave this alone
TIMESTAMP = 0


# Check if the libraries exist on this system
# if not throw a warning
try:
    import RPi.GPIO as GPIO
    print "GPIO lib is present. Moving on"
except ImportError:
    print "GPIO lib is not installed. Stopping program"
    print "Please install it with the commands:"
    print "$ sudo apt-get update"
    print "$ sudo apt-get install rpi.gpio"
    sys.exit()
try:
    subprocess.call(["fswebcam", "--version"])
except OSError as e:
    if e.errno == os.errno.ENOENT:
        # handle file not found error.
        #
        print "fswebcam not present"
        print "please install via:"
        print "sudo apt-get install fswebcam"
        sys.exit()
    else:
        # Something else went wrong while trying to run `wget`
        raise

def lighton(led1, led2, led3, led4):
    GPIO.output(led1, GPIO.HIGH)
    GPIO.output(led2, GPIO.HIGH)
    GPIO.output(led3, GPIO.HIGH)
    GPIO.output(led4, GPIO.HIGH)


def lightoff(led1, led2, led3, led4):
    GPIO.output(led1, GPIO.LOW)
    GPIO.output(led2, GPIO.LOW)
    GPIO.output(led3, GPIO.LOW)
    GPIO.output(led4, GPIO.LOW)
##
#Add more LEDs as arguments
#
def setup(led1, led2, led3, led4):
    """Setup all that stuff"""
    print "setup GPIO"
    global TIMESTAMP
    GPIO.setwarnings(True)
    GPIO.setmode(GPIO.BOARD)
    GPIO.setup(led1, GPIO.OUT)
    GPIO.setup(led2, GPIO.OUT)
    GPIO.setup(led3, GPIO.OUT)
    GPIO.setup(led4, GPIO.OUT)
    if not os.path.exists(IMAGEFOLDER):
        print "folder does not exists. Create it"
        os.makedirs(IMAGEFOLDER)
    ts = time.time()
    TIMESTAMP = datetime.datetime.fromtimestamp(ts).strftime("%Y-%m-%d_%H-%M-%S")



# now run all of that
if __name__ == '__main__':
    try:
        setup(11, 12, 15, 16)
        print "GPIO all set up"
        # this is just for testing
        # the max resolution is
        # 2592 x 1944
        # there cant be a preview when working remote via ssh
        # but if you are in the GUI you can preview the image
        # camera.start_preview()
        # time.sleep(5)
        filename = IMAGEFOLDER + IMAGENAME + TIMESTAMP + ".jpg"
        lighton(11, 12, 15, 16)
        time.sleep(0.2)
        #fswebcam -i 0 -d /dev/video0 --no-title --no-subtitle --no-info --no-banner -r 640x480 /home/pi/Desktop/fswebcam-test-eye-toy-02.jpg
        cmd = "fswebcam -i 0 -d /dev/video0 --no-title --no-subtitle --no-info --no-banner -r 640x480 " + filename
        os.system(cmd)
        # if res == 0:
        #     print "everything went fine"
        # else:
        #     print "some error while"
        time.sleep(0.2)
        lightoff(11, 12, 15, 16)
        print "made a picture and wrote it to ", filename
        # now set the permissions on the file so user pi can edit it
        os.chmod(filename, 0777)
        # camera.stop_preview()
        # GPIO.cleanup()
    except KeyboardInterrupt:
    # here you put any code you want to run before the program
    # exits when you press CTRL+C
        print "KeyboardInterrupt"
        GPIO.cleanup() # this ensures a clean exit
    # except:
    # this catches ALL other exceptions including errors.
    # You won't get any error messages for debugging
    # so only use it once your code is working
        # print "Other error or exception occurred!"
    finally:
        print "end. clean up GPIO"
        GPIO.cleanup() # this ensures a clean exit

```

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

  A) CWE-643: Improper Neutralization of Data within XPath Expressions ('XPath Injection')
  B) CWE-74: Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
  C) CWE-732: Incorrect Permission Assignment for Critical Resource
  D) CWE-918: Server-Side Request Forgery (SSRF)
  E) CWE-295: Improper Certificate Validation
  F) CWE-200: Exposure of Sensitive Information to an Unauthorized Actor
Answer: C