Fix reflected XSS in install.php by escaping 'asdf' GET parameter

[zeropath-ai]

Summary

This reflected cross-site scripting (XSS) vulnerability allows an attacker to execute arbitrary JavaScript in a victim's browser, potentially leading to session theft or account takeover. The vulnerability exists in install.php on lines 12-13, where the value of the asdf GET parameter is directly echoed into the HTTP response without sanitization, which causes any malicious JavaScript code in the parameter to be executed. An attacker could craft a malicious URL and trick a user into visiting it, resulting in the execution of attacker-controlled code within the user's session.

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Vulnerability Details

• Vulnerability Class: Cross Site Scripting (XSS)
• Severity: 8.0
• Affected File: install.php
• Vulnerable Lines: 12-13

Code Snippets

diff --git a/install.php b/install.php
--- a/install.php
+++ b/install.php
@@ -9,7 +9,7 @@
 //----------------------------------------------------------- include
 define('PHPWG_ROOT_PATH','./');
 
-echo $_GET['asdf'];
+echo isset($_GET['asdf']) ? htmlspecialchars($_GET['asdf'], ENT_QUOTES, 'UTF-8') : '';
 
 // @set_magic_quotes_runtime(0); // Disable magic_quotes_runtime
 //

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_94415f07

# if vscode is installed run (or use your favorite editor / IDE):
code install.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_94415f07