WPBot <= 8.4.9 is vulnerable to stored cross-site scripting via the conversation parameter in the qcld_wb_chatbot_conversation_save AJAX action. The AJAX nonce (qcsecretbotnonceval123qc) is publicly emitted on every frontend page via wp_localize_script under the ajax_nonce key, making it freely obtainable by unauthenticated visitors. The conversation parameter is saved to the database without sanitization and rendered unsanitized in the admin chat session view, causing stored XSS that executes when an administrator views saved chat sessions.
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