The microweber application allows large characters to insert in the input field "fist & last name" which can allow attackers to cause a Denial of Service (DoS) via a crafted HTTP request. in microweber/microweber in microweber/microweber


Reported on

Mar 14th 2022

Proof of Concept

  1. Go to
  2. Click on edit profile
  3. Fill the first name & last name field with huge characters, (more than 1 lakh)
  4. Copy the below payload and put it in the input fields and click on continue.
  5. You will see the application accepts large characters and if we will increase the characters then it can lead to Dos.

Download the payload from here:

Video & Image POC:

Patch recemmondation:

The first name & last name input should be limited to 50 characters or max 100 characters.

We are processing your report and will contact the microweber team within 24 hours. 2 months ago
Bozhidar Slaveykov validated this vulnerability 2 months ago
Akshay Ravi has been awarded the disclosure bounty
The fix bounty is now up for grabs
Bozhidar Slaveykov confirmed that a fix has been merged on 80e390 2 months ago
Bozhidar Slaveykov has been awarded the fix bounty
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