Cross-site Scripting (XSS) - Reflected in dmpop/mejiro


Reported on

Sep 14th 2021


Cross-Site Scripting (XSS) attacks are a type of injection, in which malicious scripts are injected into websites. An attacker can use XSS to send a malicious script to an unsuspecting user. The end user’s browser has no way to know that the script should not be trusted, and will execute the script. is vulnerable to XSS as shown below:

Proof of Concept

Variable: d
Method: GET

echo '<a color: #e3e3e3;" href="?page=' . ($current_page + 1) . '&d=' . $sub_photo_dir . '"><img style="margin-right:1em;" src="svg/arrow-right-o.svg"/></a>';

Visit the following url in a browser:



Because it thinks the script came from a trusted source, the malicious script can access any cookies, session tokens, or other sensitive information retained by the browser and used with that site. These scripts can even rewrite the content of the HTML page.

We have contacted a member of the dmpop/mejiro team and are waiting to hear back a year ago
Dmitri Popov validated this vulnerability a year ago
hitisec has been awarded the disclosure bounty
The fix bounty is now up for grabs
Dmitri Popov marked this as fixed with commit 23429b a year ago
Dmitri Popov has been awarded the fix bounty
This vulnerability will not receive a CVE
to join this conversation