Fix reflected XSS in comments.php by HTML-encoding 'asdf' GET parameter #102
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This reflected XSS vulnerability allows an attacker to execute arbitrary JavaScript code in a user's browser, potentially leading to session hijacking or defacement. The vulnerability exists in comments.php at line 16, where the value of the 'asdf' parameter from the $_GET array is directly echoed into the HTML output without proper sanitization, which causes any injected script code to be executed.