Cross-site Scripting (XSS) - Stored in leantime/leantime


Reported on

Jul 5th 2021

✍️ Description

Stored xss bug using a xss payload in the Hypothesis when adding a new Research

🕵️‍♂️ Proof of Concept

Goto http://localhost/leancanvas/simpleCanvas and click on add new and copy paste the following xss payload

"><img src=x onerror=alert(document.cookie)>

Click on safe and see the xss popup with the cookie.

💥 Impact

Possible to steal admin cookies or take over another account via cookie grepping.

💥 Remediation

Validate user input


3 months ago


@maintainer any thoughts about this?

We have contacted a member of the leantime team and are waiting to hear back a month ago
leantime/leantime maintainer validated this vulnerability a month ago
ribersec has been awarded the disclosure bounty
The fix bounty is now up for grabs
Marcel Folaron confirmed that a fix has been merged on 7cbdbf 23 days ago
Marcel Folaron has been awarded the fix bounty