CVE-2026-5539

Vulnerability

Overview

The vulnerability resides in the /modifymember.php file of code-projects Simple Laundry System version 1.0. The firstName parameter is not sanitized or encoded before being output to the web page, enabling Cross-Site Scripting (XSS) attacks. The root cause is insufficient input validation and output encoding, allowing an attacker to inject arbitrary script code [1].

Exploitation

Exploitation can be performed remotely without requiring authentication or prior authorization. An attacker can craft a malicious payload, such as `, and submit it via the firstName` parameter. The application then renders this payload in the victim's browser when the page is loaded, leading to script execution [1].

Impact

Successful exploitation allows an attacker to steal cookies, session tokens, and other sensitive information, perform actions on behalf of the victim, deface web pages, redirect users to malicious sites, or gain control of the victim's browser. This poses a serious threat to user privacy and system security [1].

Mitigation

No official patch has been released by the vendor as of the publication date. The recommended fix is to implement proper output encoding for all user-supplied input, particularly the firstName parameter, to prevent the execution of injected scripts [1].