CVE-2026-5093: Greenshift <= 12.8.9 - Authenticated (Contributor+) Theme Settings Modification via 'gspb_update_global_wp_settings'
The GreenShift – Animation and Page Builder Blocks plugin for WordPress is vulnerable to unauthorized modification of data in versions up to, and including, 12.8.9. This is due to a missing capability check on the 'gspbupdateglobalwpsettings' function that only verifies the 'editposts' capability instead of requiring administrative privileges. This makes it possible for authenticated attackers, with contributor-level access and above, to modify global WordPress theme color settings site-wide, leading to site defacement.
Affected Software
Remediation
Recommended actions to resolve this vulnerability, in priority order.
- Upgrade
Upgrade
Greenshift – Animation and Page Builder Blocks (GreenShift) plugin for WordPressto a version that resolves this vulnerability.Fixed in 12.8.9 - Configuration
Fix the plugin to use a capability check that requires administrative privileges for 'gspb_update_global_wp_settings' rather than only checking 'edit_posts'.
GreenShift – Animation and Page Builder Blocks plugin for WordPress Capability check for function gspb_update_global_wp_settings = Require administrative privileges instead of only verifying edit_posts - Compensating control
Restrict contributor-level (authenticated Contributor+) users so they cannot access the WordPress action/function 'gspb_update_global_wp_settings' (which performs theme settings updates).
Event History
Frequently Asked Questions
Which users can exploit this issue?
Any authenticated WordPress user with the Contributor role or higher can exploit it, because the affected function checks for the edit_posts capability rather than an administrative capability.
What can an attacker change?
An attacker can modify global WordPress theme color settings across the site. This can lead to site-wide visual defacement, but the provided data does not indicate confidentiality loss or service disruption.
Are sites affected by default?
The issue affects GreenShift versions through 12.8.9 where the vulnerable function is present. Exploitation requires an authenticated account with at least Contributor-level access.