Find and fix a security hole in a website


I got a webshop with paypal api that auto gives a virtual curency, lets call it coins1 (equal to the value send by paypal)

That can also be converted to another virtual curency through website. (coins2)

Somehow in one of these functions there is a way to exploit it, the coins1 value becomes negative and they get lots of coins2.

Am not sure if its an sql inject or other type of exploit, and im kinda betting on the convert function having a problem since they get huge amounts of coins2 while coins1 goes negative.

Evner: Javascript, Microsoft SQL Server, PayPal API, PHP

Se mere: website s security certificate fix, fix website server security breach, website security fix, oscommerce security fix, best website design security, website login security, important website audit security, website test security, asp find type function, website image small fix, autoit find type process, website sign security image, website client security, softbiz b2b trading marketplace script security fix, wep wpa windows find type, website free can fix pictures, joomla security fix, vbs find type files

Om arbejdsgiveren:
( 13 bedømmelser ) pasig, Philippines

Projekt ID: #13407980

Tildelt til:


I have experience with this type of work. Your site will be safe in no time. Let me check it out and tell you exactly how long it will take and how easy it is to be fixed.

$200 USD in 3 dage
(19 bedømmelser)

26 freelancere byder i gennemsnit $183 på dette job


Hello there, I have gone through with your listed project Description and I am Ready to start work on it Now. Let me know the URL of the existing webshop so i can look over the exact issue ? As I am an experie Flere

$176 USD in 4 dage
(243 bedømmelser)

HI, I can assist you with this Project. Here is a sampling of the few of my work contained at my portfolio: https://www.freelancer.com/u/extreamcode.html This is a placehoolder bid, I would be able to quote final p Flere

$155 USD in 3 dage
(78 bedømmelser)

Dear Employer, I have gone through your requirement and will be glad to work for you. Please take a look of some of the website done by me: ===================================================== [login to view URL] Flere

$164 USD in 6 dage
(456 bedømmelser)

I am a skilled developer, can you send me the site url to have a check? let discuss more via private message, thanks.

$155 USD in 3 dage
(424 bedømmelser)

Hi, I can start work on your project immediately once you confirm me and i am also open for further discussion if you want. I have 7+ years in web designing & development with good experience in following skills Flere

$200 USD in 3 dage
(122 bedømmelser)

Greetings from Webs Cybernetics!! We read your project description very carefully however it was not that long. :) Take a look to my last work: [login to view URL] [login to view URL] http:/ Flere

$155 USD in 5 dage
(221 bedømmelser)

Hello Sir,I always believe on this principle NO WORK NO PAYMENT. Sir, I will provide security for your server guaranteed. I will make your server completely spam [login to view URL],I never use any software or any programming scr Flere

$100 USD in 3 dage
(201 bedømmelser)

I AM READY TO DO YOUR WORK IN YOUR BUDGET AND ALSO IN YOUR TIME FRMAE.... PLESAE REPLY ME WE CAN START THE WORK ASAP.. Hello, I have 7+ years experince in PHP, Wordpress, Magento, Shopify , BigCommerce , Open Flere

$155 USD in 3 dage
(39 bedømmelser)

Hi There, First Of All, Thank you for giving me this opportunity. Let me introduce myself. I am Saurav and after seeing your listing I felt we could collaborate well with each other on this project. I have a small te Flere

$277 USD in 3 dage
(120 bedømmelser)

Hello Sir/Madam! Greetings!!! Thanks for sharing the project. I can start your project right now. I am very much interested in your project concept and of course want to get involved in this project. I got more than Flere

$30 USD på 1 dag
(140 bedømmelser)

hello. im a professional security researcher i found vulnerabilities on twitter yahoo dropbox etc check my profile here [login to view URL] i can help you to find the loophole

$50 USD in 0 dage
(204 bedømmelser)

Dear Hiring Manger, Hello, My name is smile, I have a 5+ working experience in WordPress Theme development and have developed number of Responsive WordPress Themes in my career from scratch from PSD to WORDPRESS or Flere

$150 USD in 7 dage
(95 bedømmelser)

Hi, This is angel from [login to view URL] We could build a website as mentioned in the project description Mockup could be provided on your approval, before awarding the project. We are a company located in India. Give Flere

$266 USD in 10 dage
(77 bedømmelser)
$155 USD in 3 dage
(13 bedømmelser)

Hello, It's a pleasure to let you know that I've Completed and Delivered similar project before. All I need to work on customization part if we can proceed towards more discussion. I have gone through your project Flere

$277 USD in 3 dage
(17 bedømmelser)
$98 USD på 1 dag
(37 bedømmelser)

Greetings Employer! Thank-you so much for your time and invitation! After reading the job post I have understood that you want to assist you with solving the issue which you are facing regarding the virtual curr Flere

$166 USD in 7 dage
(27 bedømmelser)

Hello, I am ready to start this work. please discuss more with me and share more information with me. I am ready to start this work right now. Looking forward your reply. Regards, usha

$55 USD på 1 dag
(16 bedømmelser)

Hi There! I read your requirement,you are Looking for web development . We have good professional development team with 5+ years experience for Wordpress, PHP, Shopify. I hope we are perfect for your require Flere

$155 USD in 3 dage
(17 bedømmelser)

Hi sir i am security provider

$55 USD på 1 dag
(34 bedømmelser)