What the vulnerability does
01Description
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.
Explanation of Vulnerability in Simple Terms
02Summary
Greenshift – animation and page builder blocks versions 12.8.3 and earlier lack proper authorization checks, allowing unauthenticated attackers to read sensitive information. The vulnerability requires only network access and no user interaction. Site administrators should update to a version newer than 12.8.3 to mitigate exposure of non-public data.
What an attacker can do
03Attacker Capabilities
Read sensitive information without logging in.
Potential impact on your site
04Site Impact
Unauthenticated visitors can access non-public data exposed by the plugin.
Conditions required to exploit
05Prerequisites
Network access only; no authentication or user interaction required.
Key dates
06Disclosure timeline
March 6, 2026
CVE published
April 8, 2026
Record updated
