Cosmic BP User Signup Password - Reflected cross-site scripting (XSS)

Summary

Name	Cosmic BP User Signup Password 1. - Reflected cross-site scripting (XSS)
Code name	skims-0029
Product	Cosmic BP User Signup Password
Affected versions	Version 1.
State	Private
Release date	2025-03-14

Vulnerability

Kind	Reflected cross-site scripting (XSS)
Rule	Reflected cross-site scripting (XSS)
Remote	No
CVSSv4 Vector	CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:L/VA:L/SC:L/SI:L/SA:L/E:U
CVSSv4 Base Score	4.8 (Medium)
Exploit available	No
CVE ID(s)	CVE-2025-31304

Description

Cosmic BP User Signup Password 1. was found to be vulnerable. The web application dynamically generates web content without validating the source of the potentially untrusted data in myapp/cc-bp-user-password.php.

Vulnerability

Skims by Fluid Attacks discovered a Reflected cross-site scripting (XSS) in Cosmic BP User Signup Password 1.. The following is the output of the tool:

Skims output

 46 | function cc_bp_pass_add_to_hidden_fields()
 47 | {
 48 | ?>
> 49 | <input type=""hidden"" name=""user_password"" value=""<?php echo $_POST['user_password']; ?>"" />
  50 | <?php
  51 |
  52 | }
     ^ Col 0

Our security policy

We have reserved the ID CVE-2025-31304 to refer to this issue from now on.

• https://fluidattacks.com/advisories/policy/

System Information

• Product: Cosmic BP User Signup Password
• Version: 1.

Mitigation

There is currently no patch available for this vulnerability.

Credits

The vulnerability was discovered by Andres Roldan from Fluid Attacks' Offensive Team using Skims

Timeline