Pull request title: Fix XSS vulnerability by HTML escaping untrusted PHP input using htmlspecialchars function

[zeropath-ai]

Summary

"""

• The Vulnerability Description: The vulnerability involves direct access to a PHP variable without HTML escaping in an inline PHP statement that uses data from $_REQUEST[...]. This creates a Cross-site Scripting (XSS) risk, potentially allowing malicious JavaScript to execute and lead to issues like account compromise and sensitive data leakage.
• This Fix: The fix applies HTML escaping to the user input by using the htmlspecialchars() function to encode special characters, thereby preventing the execution of malicious scripts and ensuring safe rendering of user input in the web page.
• The Cause of the Issue: The issue arises from the failure to sanitize untrusted input from $_REQUEST[...] before rendering it in a web page. Without escaping, this untrusted input could inject executable scripts into the HTML content.
• The Patch Implementation: The patch modifies the index.php file to wrap the value of $_GET["test"] with htmlspecialchars(), using ENT_QUOTES and 'UTF-8' as parameters to ensure that all special characters, including quotation marks, are properly encoded for safe HTML rendering.
  """

Vulnerability Details

• Vulnerability Class: Cross Site Scripting (XSS)
• Severity: 5.3
• Affected File: index.php
• Vulnerable Lines: 3-3

Code Snippets

diff --git a/index.php b/index.php
index cd00388..f6293fb 100644
--- a/index.php
+++ b/index.php
@@ -1,5 +1,5 @@
 <?php
 
-echo $_GET["test"];
+echo htmlspecialchars($_GET["test"], ENT_QUOTES, 'UTF-8');
 
 ?>

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.

Ask @zeropath-ai!

To request modifications, please post a comment beginning with @zeropath-ai and specify the changes required.

@zeropath-ai will then implement the requested adjustments and commit them to the specified branch in this pull request. Our bot is capable of managing changes across multiple files and various development-related requests.

Manually Modify the Files

# Checkout created branch:
git checkout zvuln_fix_cross_site_scripting_xss_1733947097566924

# 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_cross_site_scripting_xss_1733947097566924