Cross-site Scripting (XSS) - Reflected in kasuganosoras/pigeon


Reported on

Sep 7th 2021

✍️ Description

Cross-site Scripting (XSS) refers to client-side code injection attack wherein an attacker can execute malicious scripts into a legitimate website or web application. XSS occurs when a web application makes use of unvalidated or unencoded user input within the output it generates.

The user input POST parameter username of register.php is unsanitized resulting reflected cross site scripting.


Apply context-dependent encoding and/or validation to user input rendered on a page


We created a GitHub Issue asking the maintainers to create a a year ago
We have contacted a member of the kasuganosoras/pigeon team and are waiting to hear back a year ago
a year ago


Thanks for the report. This issue is already fixed in the master branch: Link

kasuganosoras validated this vulnerability a year ago
wtwver has been awarded the disclosure bounty
The fix bounty is now up for grabs
kasuganosoras confirmed that a fix has been merged on ba71b0 a year ago
The fix bounty has been dropped
register.php#L30 has been validated
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