CVE-2026-1927: Greenshift WordPress Info Disclosure Flaw

CVE-2026-1927 Overview

The Greenshift – animation and page builder blocks plugin for WordPress is vulnerable to unauthorized access of data due to a missing capability check on the greenshift_app_pass_validation() function in all versions up to, and including, 12.5.7. This makes it possible for authenticated attackers, with Subscriber-level access and above, to retrieve global plugin settings including stored AI API keys.

Critical Impact

Authenticated users with minimal privileges (Subscriber-level) can access sensitive plugin configuration data including AI API keys, potentially leading to unauthorized use of third-party services and further compromise.

Affected Products

• Greenshift – animation and page builder blocks plugin for WordPress versions up to and including 12.5.7

Discovery Timeline

• 2026-02-05 - CVE-2026-1927 published to NVD
• 2026-02-05 - Last updated in NVD database

Technical Details for CVE-2026-1927

Vulnerability Analysis

This vulnerability is classified as CWE-862: Missing Authorization. The greenshift_app_pass_validation() function in the Greenshift plugin lacks proper capability checks, allowing any authenticated user—regardless of their role—to invoke the function and retrieve sensitive plugin settings.

In WordPress, capability checks are essential for ensuring that only users with appropriate permissions can access certain functionality. By omitting this check, the plugin inadvertently exposes its configuration data to all authenticated users, including those with the lowest privilege level (Subscriber). This is particularly concerning because the exposed settings include AI API keys, which could be leveraged by attackers for unauthorized API usage or as a stepping stone for further attacks.

The vulnerability is exploitable over the network and requires low attack complexity, though it does require authentication. The impact is limited to confidentiality, with no direct effect on integrity or availability.

Root Cause

The root cause of this vulnerability is the absence of a capability check in the greenshift_app_pass_validation() function. WordPress plugins should use functions like current_user_can() to verify that the requesting user has the appropriate permissions before executing sensitive operations or returning protected data. Without this authorization gate, the function processes requests from any authenticated user regardless of their role.

Attack Vector

An attacker with valid WordPress credentials (even at the Subscriber level) can exploit this vulnerability by calling the vulnerable function endpoint. Upon successful exploitation, the attacker receives the plugin's global settings, which include sensitive information such as stored AI API keys. These keys could then be:

1. Used to make unauthorized API calls at the site owner's expense
2. Sold or shared on underground forums
3. Leveraged to gather additional information about the target environment
4. Used as part of a larger attack chain against the WordPress installation

The vulnerability requires authentication but no user interaction, making it straightforward to exploit once credentials are obtained.

Detection Methods for CVE-2026-1927

Indicators of Compromise

• Unexpected API calls or billing activity associated with stored AI service API keys
• WordPress access logs showing Subscriber-level users accessing plugin settings endpoints
• Unusual activity from low-privilege user accounts accessing administrative functions
• API key usage patterns inconsistent with normal site operations

Detection Strategies

• Monitor WordPress request logs for calls to the greenshift_app_pass_validation() function from non-administrative users
• Implement Web Application Firewall (WAF) rules to detect unauthorized access attempts to plugin settings endpoints
• Review WordPress user activity logs for Subscriber-level accounts accessing plugin configuration data
• Deploy security plugins that can detect and alert on unusual authorization patterns

Monitoring Recommendations

• Enable comprehensive logging for WordPress plugin API endpoints
• Set up alerts for any Subscriber-level users accessing plugin settings or administrative functions
• Monitor third-party AI API usage for anomalies that could indicate key compromise
• Regularly audit WordPress user accounts and their recent activity

How to Mitigate CVE-2026-1927

Immediate Actions Required

• Update the Greenshift – animation and page builder blocks plugin to the latest patched version immediately
• Rotate any AI API keys that were stored in the plugin settings as a precautionary measure
• Review WordPress access logs for any suspicious access to plugin settings by low-privilege users
• Audit current WordPress user accounts, especially those with Subscriber-level access

Patch Information

The vulnerability has been addressed by the plugin developers. The fix can be reviewed in the WordPress Plugin Changeset. Additional vulnerability details are available from the Wordfence Vulnerability Intelligence report. Site administrators should update to a version higher than 12.5.7 to remediate this vulnerability.

Workarounds

• Temporarily disable the Greenshift plugin until the patch can be applied if immediate updating is not feasible
• Remove or revoke Subscriber-level accounts that are not essential to site operations
• Implement additional access controls at the server or WAF level to restrict access to plugin endpoints
• Consider removing stored API keys from the plugin settings until the update is applied