LitmusChaos Client-Side Validation Bypass Vulnerability in User Profile Fields

A client-side validation bypass vulnerability has been identified in LitmusChaos versions through 3.19.0. This issue allows attackers to circumvent frontend restrictions on special characters in user profile fields, such as the display name. While the application initially blocks certain characters through JavaScript or HTML5 validation, these measures can be easily bypassed by manipulating HTTP requests. The backend fails to apply equivalent validation, leading to inconsistent input handling and potential downstream issues, such as injection vectors or broken data integrity.

Impact

Exploitation of this vulnerability can result in inconsistent application behavior, potential injection vectors if the data is improperly sanitized before being rendered, and compromised data integrity.

Reproduction

To reproduce this vulnerability, log in as an admin user and attempt to change the display name in the user profile by inserting special characters. The frontend will initially block this action, indicating a validation error. However, this restriction can be bypassed by intercepting the HTTP request with a tool like Burp Suite. Modify the request to include the special characters in the name field, then forward the request to the server. The backend will accept the modified request, and the changes will be reflected in the user interface, demonstrating that the client-side validation was successfully bypassed.