Invoice Plane version 1.5.4 and earlier contains a Cross Site Scripting (XSS) vulnerability in Client's details that can result in execution of javascript code . This vulnerability appears to have been fixed in 1.5.5 and later.

InvoicePlane version 1.4.10 is vulnerable to a Stored Cross Site Scripting resulting in allowing an authenticated user to inject malicious client side script which will be executed in the browser of users if they visit the manipulated site.

InvoicePlane version 1.4.10 is vulnerable to a Arbitrary File Upload resulting in an authenticated user can upload a malicious file to the webserver. It is possible for an attacker to upload a script which is able to compromise the webserver.