Sanitize asdf GET parameter in index.php to prevent reflected XSS

[zeropath-ai-dev]

Summary

This reflected cross-site scripting (XSS) vulnerability allows attackers to execute arbitrary JavaScript in a victim's browser, potentially leading to session theft or other malicious actions. The index.php script directly echoes the value of the asdf GET parameter on line 23 without proper sanitization, which causes any injected JavaScript code to be executed when the page is loaded. An attacker can craft a malicious URL with JavaScript in the asdf parameter and send it to a victim.

View in dashboard

Vulnerability Details

• Vulnerability Class: Cross Site Scripting (XSS)
• Severity: 9.0
• Affected File: index.php
• Vulnerable Lines: 23-23

Code Snippets

diff --git a/index.php b/index.php
--- a/index.php
+++ b/index.php
@@ -19,9 +19,15 @@
 
 
 
-echo $_GET['asdf'];
-echo $_GET['asdf'];
-echo $_GET['asdf'];
+if (isset($_GET['asdf'])) {
+  echo htmlspecialchars($_GET['asdf'], ENT_QUOTES, 'UTF-8');
+}
+if (isset($_GET['asdf'])) {
+  echo htmlspecialchars($_GET['asdf'], ENT_QUOTES, 'UTF-8');
+}
+if (isset($_GET['asdf'])) {
+  echo 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.

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_b3a60e47

# 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_b3a60e47