Cross-site Scripting (XSS) - Reflected in yourls/yourls


Reported on

Sep 9th 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 GET parameter oldsql of upgrade.php is unsanitized resulting reflected cross site scripting.


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


We have contacted a member of the yourls team and are waiting to hear back 2 years ago
྅༻ Ǭɀħ ༄༆ཉ
2 years ago

Thanks for reporting. Fixed:

྅༻ Ǭɀħ ༄༆ཉ marked this as fixed with commit 94f6ba 2 years ago
྅༻ Ǭɀħ ༄༆ཉ has been awarded the fix bounty
This vulnerability will not receive a CVE
Jamie Slome
2 years ago


CVE published! 🎊

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