Description

Stored Cross-Site Scripting (XSS) vulnerability due to the lack of content validation and output encoding. This vulnerability can be exploited by uploading a crafted payload inside a document. Then, the vulnerability can be triggered when the user previews the document´s content.

Proof of Concept

https://drive.google.com/file/d/1CwdnTS6-8QeKL1z9gMe5Gi47RDshs9g1/view?usp=sharing

https://drive.google.com/file/d/19feUEHz0m0KJeOMJerizZ_IUUfYYa112/view?usp=sharing

Payload

injection point Invoicing address "><img src=x onerror=confirm(1)>

Impact

Stored XSS generally occurs when user input is stored on the target server, such as in a database, in a message forum, visitor log, comment field, etc. And then a victim is able to retrieve the stored data from the web application without that data being made safe to render in the browser.