Flexme Flex Import Plugin up to 3.0 on WordPress AJAX Handlers wpnonce missing authentication

Summaryinfo

A vulnerability identified as problematic has been detected in Flexme Flex Import Plugin up to 3.0. This affects the function license_activate_fleximp/license_deactivate_fleximp of the component AJAX Handlers. This manipulation of the argument wpnonce causes missing authentication. The identification of this vulnerability is CVE-2026-9615. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic was found in Flexme Flex Import Plugin up to 3.0. Affected by this vulnerability is the function license_activate_fleximp/license_deactivate_fleximp of the component AJAX Handlers. The manipulation of the argument wpnonce with an unknown input leads to a missing authentication vulnerability. The CWE definition for the vulnerability is CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. As an impact it is known to affect integrity, and availability. The summary by CVE is:

The Flex Import plugin for WordPress is vulnerable to Missing Authorization in all versions up to, and including, 3.0. This is due to the license_activate_fleximp() and license_deactivate_fleximp() functions, hooked to the wp_ajax_license_activate_fleximp and wp_ajax_license_deactivate_fleximp AJAX actions, lacking both a capability check (current_user_can()) and nonce verification (the client-side script sends a 'wpnonce' value but the handlers never validate it). This makes it possible for authenticated attackers, with subscriber-level access and above, to activate an arbitrary/fraudulent license key (persisting it via update_option('fleximp_is_premium') and toggling validation, suspension, and bundle status options) or deactivate the site's legitimate license (deleting the stored key and setting fleximp_validation_status to false), thereby disrupting the plugin's premium functionality.

It is possible to read the advisory at wordfence.com. This vulnerability is known as CVE-2026-9615 since 05/26/2026. The exploitation appears to be easy. The attack can be launched remotely. Technical details of the vulnerability are known, but there is no available exploit. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 09/19/2026).

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

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Productinfo

Type

• WordPress Plugin

Vendor

• Flexme

Name

• Flex Import Plugin

Version

• 3.0

CPE 2.3info

• 🔒

CPE 2.2info

• 🔒

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