Greenshift Plugin up to 12.8.3 on WordPress AJAX gspb_el_reusable_load post_id resource injection

Summaryinfo

A vulnerability marked as critical has been reported in Greenshift Plugin up to 12.8.3 on WordPress. This impacts the function gspb_el_reusable_load of the component AJAX Handler. Performing a manipulation of the argument post_id results in resource injection. This vulnerability is cataloged as CVE-2026-2371. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as critical has been found in Greenshift Plugin up to 12.8.3 on WordPress. This affects the function gspb_el_reusable_load of the component AJAX Handler. The manipulation of the argument post_id with an unknown input leads to a resource injection vulnerability. CWE is classifying the issue as CWE-99. The product receives input from an upstream component, but it does not restrict or incorrectly restricts the input before it is used as an identifier for a resource that may be outside the intended sphere of control. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

The Greenshift – animation and page builder blocks plugin for WordPress is vulnerable to Insecure Direct Object Reference in all versions up to, and including, 12.8.3. This is due to missing authorization and post status validation in the `gspb_el_reusable_load()` AJAX handler. The handler accepts an arbitrary `post_id` parameter and renders the content of any `wp_block` post without checking `current_user_can('read_post', $post_id)` or verifying the post status. Combined with the nonce being exposed to unauthenticated users on any public page using the `[wp_reusable_render]` shortcode with `ajax="1"`, this makes it possible for unauthenticated attackers to retrieve the rendered HTML content of private, draft, or password-protected reusable blocks.

It is possible to read the advisory at wordfence.com. This vulnerability is uniquely identified as CVE-2026-2371. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. 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 03/08/2026).

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

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-10091). Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• WordPress Plugin

Name

• Greenshift Plugin

Version

• 12.8.0
• 12.8.1
• 12.8.2
• 12.8.3

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Be aware that VulDB is the high quality source for vulnerability data.

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