Captcha problem users just refresh and it will let them auto submit again

Posted on 16th Feb 2014 07:03 pm by admin

Users will just re submit and not have to enter the new captcha.. ? Lol but if i refresh the page, the captcha auto makes a new1 so u cant submit.

But if u enter captcha code alrdy, then submit form correctly, and press refresh to auto submit form, it does it? This is a major security risk here is my code, thanks:

Code: session_start();

$RandomStr = md5(microtime());// md5 to generate the random string
$text = rand(10000,99999);
$_SESSION["key"] = $text;
$height = 25;
$width = 35;

$image_p = imagecreate($width, $height);
$black = imagecolorallocate($image_p, 100, 5, 5);
$white = imagecolorallocate($image_p, 155, 155, 025);
$font_size = 16;
$text=substr($_SESSION['key'],0,3);
imagestring($image_p, $font_size, 5, 5, $text, $white);
imagejpeg($image_p, null, 80);

then my HTML:

Code: <tr class="bts ce"><td colspan=2><b>Security Code Confirmation</b></td></tr>

<tr>
<td align="right">Your unique security code<input type="hidden" name="secId" value="76c2b0e6f20ed0f1b209bcf39dee8e06"></td>
<td>
<img src="php_captcha.php">

<span class="desc">If The images are broke, please contact us.</span></span>
</td>
</tr>
Is there a way so people cant auto submit form?

Captcha works if u refresh but people can just auto submit the form and it will keep submiiting...

Your Answer:

Login to answer

Other forums

Parse Error
Hi Guys,

I have a function in my class which returns a string link variable. The problem is i

PHP If Else statement for breadcrumb
Hi

I am trying to use a PHP if else statement to display a breadcrumb link on wordpress

File upload issues
Hi Guys,

Can anyone see any issues with this code:
Code: [Select]$setImage= 'productimages

Optimize Code
Just started getting into the use of cookies. The following code will redirect users to a set URL s

While Problem
i am having a problem with a while statement here is the code
Code: [Select]<?php
sess

Uploading/Downloading files stored in MySQL database
Hey all,

This problem just came up in my website and I'm having a hard time figuring out what

Intrastat Report Config in ECC 6.0 - goods Movement in EU countries
Colleagues, need ur help to understand the changes require in ECC 6 standard Report configuration se

Different payment methods with different cross company requirements in F110
We are implementing SAP in a company in the shipping industry. They have the following requirement:<

Output Buffering question
Hi all,

I've been trying to wrap my head around output buffering. So far I've found tons of

How to give the privillege for triggers?
Hi,

How to give the privillage for triggers to particular user?

Please let me