Sanitize 'asdf' GET output with htmlspecialchars to prevent reflected XSS

[zeropath-ai-dean]

Summary

The application is vulnerable to reflected cross-site scripting (XSS). Specifically, the index.php script directly echoes user-supplied input from the 'asdf' GET parameter on line 24, which causes arbitrary JavaScript code to execute in a victim's browser. An attacker can craft a malicious URL containing JavaScript in the 'asdf' parameter to steal cookies or perform actions on behalf of a logged-in user.

View in dashboard

Vulnerability Details

• Vulnerability Class: Cross Site Scripting (XSS)
• Severity: 9.0
• Affected File: index.php
• Vulnerable Lines: 24-24

Code Snippets

diff --git a/index.php b/index.php
--- a/index.php
+++ b/index.php
@@ -19,9 +19,9 @@
 
 
 
-echo $_GET['asdf'];
-echo $_GET['asdf'];
-echo $_GET['asdf'];
+echo isset($_GET['asdf']) ? htmlspecialchars($_GET['asdf'], ENT_QUOTES, 'UTF-8') : '';
+echo isset($_GET['asdf']) ? htmlspecialchars($_GET['asdf'], ENT_QUOTES, 'UTF-8') : '';
+echo isset($_GET['asdf']) ? htmlspecialchars($_GET['asdf'], ENT_QUOTES, 'UTF-8') : '';
 
 // access authorization check
 if (isset($page['category']))

How to Modify the Patch

You can modify this patch by using one of the two methods outlined below. We recommend using the @zeropath-ai bot for updating the code. If you encounter any bugs or issues with the patch, please report them here.

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Manually Modify the Files

# Checkout created branch:
git checkout zvuln_fix_17c7b51e

# if vscode is installed run (or use your favorite editor / IDE):
code index.php

# Add, commit, and push changes:
git add -A
git commit -m "Update generated patch with x, y, and z changes."
git push zvuln_fix_17c7b51e