CVE-2025-62924: Post Grid Authorization Bypass Flaw

CVE-2025-62924 Overview

CVE-2025-62924 is a Missing Authorization vulnerability [CWE-862] affecting the PickPlugins Post Grid and Gutenberg Blocks plugin for WordPress. The flaw exists in post-grid versions up to and including 2.3.17, allowing authenticated attackers with low-level privileges to exploit incorrectly configured access control checks. Successful exploitation leads to unauthorized disclosure of data handled by the plugin without requiring user interaction. The vulnerability is exploitable remotely over the network with low attack complexity. No public proof-of-concept or in-the-wild exploitation has been reported as of publication.

Critical Impact

Authenticated low-privilege users can bypass access control checks in the Post Grid and Gutenberg Blocks WordPress plugin to access restricted plugin functionality and confidential data.

Affected Products

• PickPlugins Post Grid and Gutenberg Blocks (post-grid) plugin for WordPress
• All versions from initial release through 2.3.17 (inclusive)
• WordPress sites running the vulnerable plugin with any authenticated user account

Discovery Timeline

• 2025-10-27 - CVE-2025-62924 published to the National Vulnerability Database (NVD)
• 2026-04-28 - Last updated in NVD database

Technical Details for CVE-2025-62924

Vulnerability Analysis

The vulnerability is a Broken Access Control issue classified under [CWE-862] Missing Authorization. The Post Grid and Gutenberg Blocks plugin exposes one or more actions or endpoints that fail to verify whether the requesting user holds the required capability or role. Any authenticated user, including low-privilege roles such as Subscriber, can invoke these endpoints. The result is unauthorized read access to information that should be restricted to administrators or editors. Integrity and availability are not impacted based on the published CVSS vector.

Root Cause

The root cause is the absence of capability checks such as current_user_can() or nonce validation on plugin action handlers. WordPress plugins must explicitly enforce authorization on every AJAX action, REST route, and admin-post handler. When these checks are missing, the framework defaults to allowing any logged-in user to invoke the handler. Patchstack tracks this issue as a broken access control flaw in the plugin's privileged endpoints.

Attack Vector

Exploitation requires only a valid low-privilege account on the target WordPress site. An attacker registers or compromises a Subscriber-level account, then sends a crafted HTTP request to the vulnerable plugin endpoint. The server processes the request without verifying privileges and returns sensitive data. No social engineering or administrative interaction is required. The attack is fully remote and scriptable.

No verified public exploit code is available. Refer to the Patchstack Vulnerability Report for technical details.

Detection Methods for CVE-2025-62924

Indicators of Compromise

• Unexpected HTTP POST or GET requests to admin-ajax.php containing plugin-specific action parameters from Subscriber-level accounts
• Authenticated requests to /wp-json/ REST routes exposed by the post-grid plugin originating from non-administrative users
• Anomalous data egress volume tied to WordPress session cookies belonging to low-privilege user roles

Detection Strategies

• Audit WordPress access logs for repeated authenticated requests to plugin endpoints from accounts that should not interact with the plugin's admin features
• Compare the installed version of post-grid against the patched release across the WordPress estate using plugin inventory tooling
• Enable WordPress security logging plugins to capture authenticated user actions and flag privilege boundary anomalies

Monitoring Recommendations

• Alert on creation of new low-privilege user accounts followed by immediate requests to plugin AJAX or REST endpoints
• Monitor outbound responses from admin-ajax.php for unusually large payloads to Subscriber session contexts
• Track plugin version changes and disabled-state events across managed WordPress installations

How to Mitigate CVE-2025-62924

Immediate Actions Required

• Update the Post Grid and Gutenberg Blocks plugin to a version newer than 2.3.17 as soon as the vendor publishes a fixed release
• Audit existing WordPress user accounts and remove or disable unused low-privilege accounts that could be leveraged for exploitation
• Restrict open user registration on production WordPress sites unless explicitly required

Patch Information

The vulnerability affects all versions of Post Grid and Gutenberg Blocks up to and including 2.3.17. Site administrators should consult the Patchstack Vulnerability Report and the plugin's WordPress.org listing to identify and install the patched release.

Workarounds

• Temporarily deactivate the post-grid plugin until a vendor patch is installed if the plugin is not business-critical
• Deploy a Web Application Firewall (WAF) rule blocking unauthenticated and low-privilege access to admin-ajax.php actions associated with the plugin
• Disable new user self-registration via WordPress Settings to reduce the attacker's ability to obtain a low-privilege account

# Disable WordPress user self-registration via wp-cli
wp option update users_can_register 0

# Confirm installed plugin version
wp plugin get post-grid --field=version

# Deactivate the vulnerable plugin until patched
wp plugin deactivate post-grid