Documents in textarea
I have a contact form on a web site; just ordinary html in a php page:<textarea name="message" id ="message" rows="10" cols="30"> </textarea>
I didn't yet sanitize the input as I figured that it was only going to be sent as an email anyway...
Interestingly, the spammers have found a way of attaching/inserting what appears to be a .PDF doc to the message.
My two questions are:
1. How are they doing this? I can't seem to find a way to insert a document or attach a document to a message in a textarea, so how can they?
2. Will sanitizing the input with strip_tags and htmlspecialchars stop them doing it?
Thanks.
Edit:
Thanks for getting back to me - here is a screen shot of one of the emails; as you say, gmail seems to be picking up the url:
I don't suppose I should click on that link, hey?
php pdf textarea sanitize
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
add a comment |
I have a contact form on a web site; just ordinary html in a php page:<textarea name="message" id ="message" rows="10" cols="30"> </textarea>
I didn't yet sanitize the input as I figured that it was only going to be sent as an email anyway...
Interestingly, the spammers have found a way of attaching/inserting what appears to be a .PDF doc to the message.
My two questions are:
1. How are they doing this? I can't seem to find a way to insert a document or attach a document to a message in a textarea, so how can they?
2. Will sanitizing the input with strip_tags and htmlspecialchars stop them doing it?
Thanks.
Edit:
Thanks for getting back to me - here is a screen shot of one of the emails; as you say, gmail seems to be picking up the url:
I don't suppose I should click on that link, hey?
php pdf textarea sanitize
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
add a comment |
I have a contact form on a web site; just ordinary html in a php page:<textarea name="message" id ="message" rows="10" cols="30"> </textarea>
I didn't yet sanitize the input as I figured that it was only going to be sent as an email anyway...
Interestingly, the spammers have found a way of attaching/inserting what appears to be a .PDF doc to the message.
My two questions are:
1. How are they doing this? I can't seem to find a way to insert a document or attach a document to a message in a textarea, so how can they?
2. Will sanitizing the input with strip_tags and htmlspecialchars stop them doing it?
Thanks.
Edit:
Thanks for getting back to me - here is a screen shot of one of the emails; as you say, gmail seems to be picking up the url:
I don't suppose I should click on that link, hey?
php pdf textarea sanitize
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
I have a contact form on a web site; just ordinary html in a php page:<textarea name="message" id ="message" rows="10" cols="30"> </textarea>
I didn't yet sanitize the input as I figured that it was only going to be sent as an email anyway...
Interestingly, the spammers have found a way of attaching/inserting what appears to be a .PDF doc to the message.
My two questions are:
1. How are they doing this? I can't seem to find a way to insert a document or attach a document to a message in a textarea, so how can they?
2. Will sanitizing the input with strip_tags and htmlspecialchars stop them doing it?
Thanks.
Edit:
Thanks for getting back to me - here is a screen shot of one of the emails; as you say, gmail seems to be picking up the url:
I don't suppose I should click on that link, hey?
php pdf textarea sanitize
php pdf textarea sanitize
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
edited Nov 21 '18 at 4:14
chris_c
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
asked Nov 20 '18 at 3:40
chris_cchris_c
2615
2615
add a comment |
add a comment |
1 Answer
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Without more detail, I can only guess. <textarea> does not allow attaching a file, only text (string of any characters). It would allow including a URL in the text. If you send this URL-containing text via email, your email reader likely recognizes the URL-string and converts it to a clickable link. So, strictly speaking, the PDF file is not appended to the email, but a link to the PDF is.
If this is the case, sanitizing for HTML tags won't work but sanitizing for URLs will.
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
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1 Answer
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1 Answer
1
active
oldest
votes
active
oldest
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active
oldest
votes
Without more detail, I can only guess. <textarea> does not allow attaching a file, only text (string of any characters). It would allow including a URL in the text. If you send this URL-containing text via email, your email reader likely recognizes the URL-string and converts it to a clickable link. So, strictly speaking, the PDF file is not appended to the email, but a link to the PDF is.
If this is the case, sanitizing for HTML tags won't work but sanitizing for URLs will.
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
add a comment |
Without more detail, I can only guess. <textarea> does not allow attaching a file, only text (string of any characters). It would allow including a URL in the text. If you send this URL-containing text via email, your email reader likely recognizes the URL-string and converts it to a clickable link. So, strictly speaking, the PDF file is not appended to the email, but a link to the PDF is.
If this is the case, sanitizing for HTML tags won't work but sanitizing for URLs will.
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
add a comment |
Without more detail, I can only guess. <textarea> does not allow attaching a file, only text (string of any characters). It would allow including a URL in the text. If you send this URL-containing text via email, your email reader likely recognizes the URL-string and converts it to a clickable link. So, strictly speaking, the PDF file is not appended to the email, but a link to the PDF is.
If this is the case, sanitizing for HTML tags won't work but sanitizing for URLs will.
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
Without more detail, I can only guess. <textarea> does not allow attaching a file, only text (string of any characters). It would allow including a URL in the text. If you send this URL-containing text via email, your email reader likely recognizes the URL-string and converts it to a clickable link. So, strictly speaking, the PDF file is not appended to the email, but a link to the PDF is.
If this is the case, sanitizing for HTML tags won't work but sanitizing for URLs will.
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
answered Nov 20 '18 at 3:48
BareNakedCoderBareNakedCoder
2,5872813
2,5872813
add a comment |
add a comment |
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