Is Custom Field Template safe? Known vulnerabilities and latest version

The Custom Field Template plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 2.7.8 via the edit_meta_value due to missing validation on a user controlled key. This makes it possible for authenticated attackers, with contributor-level access and above, to delete arbitrary media attachments site-wide by supplying any numeric attachment ID in the file-field parameter alongside the corresponding delete flag, causing content loss and broken pages. Exploitation requires that the attacker's post is governed by a Custom Field Template containing at least one file-type field with the mediaRemove option not enabled, which is the default configuration for file fields.

The Custom Field Template plugin for WordPress is vulnerable to generic SQL Injection via the 'post_ID' parameter in all versions up to, and including, 2.7.8 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with contributor-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database. The capability check via current_user_can('edit_post', $id) is bypassable because WordPress internally casts $id to an integer for the permission evaluation while the full unsanitized string is preserved and passed to the SQL sink, and a valid nonce — which is also required — can be legitimately obtained by any Contributor-level user from the post edit screen.

Contributor SQL Injection in Custom Field Template <= 2.7.8 versions.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Hiroaki Miyashita Custom Field Template custom-field-template allows Stored XSS.This issue affects Custom Field Template: from n/a through <= 2.7.7.

Exposure of Sensitive System Information to an Unauthorized Control Sphere vulnerability in Hiroaki Miyashita Custom Field Template custom-field-template allows Retrieve Embedded Sensitive Data.This issue affects Custom Field Template: from n/a through <= 2.7.6.

Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Hiroaki Miyashita Custom Field Template allows Stored XSS.This issue affects Custom Field Template: from n/a through 2.6.5.

The Custom Field Template plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's 'cpt' shortcode in all versions up to, and including, 2.6.1 due to insufficient input sanitization and output escaping on user supplied post meta. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Custom Field Template plugin for WordPress is vulnerable to Sensitive Information Exposure in all versions up to, and including, 2.6.1 via the 'cft' shortcode. This makes it possible for authenticated attackers with contributor access and above, to extract sensitive data including arbitrary post metadata.

The Custom Field Template plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the plugin's custom field name column in all versions up to, and including, 2.6.1 due to insufficient input sanitization and output escaping on user supplied custom fields. This makes it possible for authenticated attackers with contributor-level and above permissions to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page.

The Custom Field Template plugin for WordPress is vulnerable to Stored Cross-Site Scripting via admin settings in all versions up to, and including, 2.6.1 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Hiroaki Miyashita Custom Field Template allows Stored XSS.This issue affects Custom Field Template: from n/a through 2.6.

Unauth. Reflected Cross-Site Scripting (XSS) vulnerability in Hiroaki Miyashita Custom Field Template plugin <= 2.5.9 versions.

Cross-Site Request Forgery (CSRF) vulnerability in Hiroaki Miyashita Custom Field Template plugin <= 2.5.8 versions.

The Custom Field Template plugin for WordPress is vulnerable to Cross-Site Request Forgery in versions up to, and including, 2.5.1. This is due to missing or incorrect nonce validation on the edit_meta_value() function. This makes it possible for unauthenticated attackers to edit meta field values via a forged request granted they can trick a site administrator into performing an action such as clicking on a link.

The Custom Field Template WordPress plugin before 2.5.8 unserialises the content of an imported file, which could lead to PHP object injections issues when a high privilege user import (intentionally or not) a malicious Customizer Styling file and a suitable gadget chain is present on the blog.