CVE-2021-24226: In the AccessAlly WordPress plugin before 3.5.7, the file "resource/frontend/product/product-shortcode.php" responsible for the [accessally_order_form]…

PriorityP354high7.5CVSS 3.1

AVNACLPRNUINSUCHINAN

EXPLOIT

EPSS

5.40%

91.7th percentile

In the AccessAlly WordPress plugin before 3.5.7, the file "resource/frontend/product/product-shortcode.php" responsible for the [accessally_order_form] shortcode is dumping serialize($_SERVER), which contains all environment variables. The leakage occurs on all public facing pages containing the [accessally_order_form] shortcode, no login or administrator role is required.

Affected

1 ranges

Vendor	Product	Version range	Fixed in
accessally	accessally	< 3.5.7	3.5.7

Detection & IOCsextracted from sources · hover to see the quote

other<div id="accessally-testing-data"↗

→Send an unauthenticated HTTP GET request to any public-facing page containing the [accessally_order_form] shortcode and look for the string '<div id="accessally-testing-data"' in the response body to confirm sensitive environment variable leakage. ↗
→No authentication or administrator role is required to trigger the vulnerability; any public-facing page with the shortcode is sufficient. ↗
→The leaked data is a PHP serialized dump of $_SERVER (all environment variables), so look for serialized PHP data structures in the HTTP response body alongside the accessally-testing-data div. ↗

·Vulnerability only affects AccessAlly WordPress plugin versions strictly before 3.5.7; version 3.5.7 and above are not affected. ↗
·The leakage is only present on pages where the site owner has placed the [accessally_order_form] shortcode; not all pages on an affected site will expose the data. ↗

CVSS provenance

nvdv3.17.5HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

nvdv2.05.0MEDIUMAV:N/AC:L/Au:N/C:P/I:N/A:N

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