themehigh Checkout Field Editor for WooCommerce Plugin up to 2.1.7 on WordPress Order Details class-thwcfd-block-order-data.php prepare_single_field_data cross site scripting

Summaryinfo

A vulnerability was found in themehigh Checkout Field Editor for WooCommerce Plugin up to 2.1.7 on WordPress. It has been classified as problematic. This affects the function prepare_single_field_data of the file class-thwcfd-block-order-data.php of the component Order Details Handler. The manipulation leads to cross site scripting. This vulnerability is traded as CVE-2026-3231. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability was found in themehigh Checkout Field Editor for WooCommerce Plugin up to 2.1.7 on WordPress. It has been rated as problematic. This issue affects the function prepare_single_field_data of the file class-thwcfd-block-order-data.php of the component Order Details Handler. The manipulation with an unknown input leads to a cross site scripting vulnerability. Using CWE to declare the problem leads to CWE-79. The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users. Impacted is integrity. The summary by CVE is:

The Checkout Field Editor (Checkout Manager) for WooCommerce plugin for WordPress is vulnerable to Stored Cross-Site Scripting via custom radio and checkboxgroup field values submitted through the WooCommerce Block Checkout Store API in all versions up to, and including, 2.1.7. This is due to the `prepare_single_field_data()` method in `class-thwcfd-block-order-data.php` first escaping values with `esc_html()` then immediately reversing the escaping with `html_entity_decode()` for radio and checkboxgroup field types, combined with a permissive `wp_kses()` allowlist in `get_allowed_html()` that explicitly permits the `<select>` element with the `onchange` event handler attribute. This makes it possible for unauthenticated attackers to inject arbitrary web scripts via the Store API checkout endpoint that execute when an administrator views the order details page.

The weakness was shared by Dmitrii Ignatyev. The advisory is shared at wordfence.com. The identification of this vulnerability is CVE-2026-3231 since 02/25/2026. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. It demands that the victim is doing some kind of user interaction. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1059.007 for this issue.

By approaching the search of inurl:class-thwcfd-block-order-data.php it is possible to find vulnerable targets with Google Hacking.

Upgrading to version 2.1.7 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• E-Commerce Management Software

Vendor

• themehigh

Name

• Checkout Field Editor for WooCommerce Plugin

Version

• 2.1.0
• 2.1.1
• 2.1.2
• 2.1.3
• 2.1.4
• 2.1.5
• 2.1.6
• 2.1.7

CPE 2.3info

• 🔒
• 🔒
• 🔒

CPE 2.2info

• 🔒
• 🔒
• 🔒

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Discussion