CVE-2025-54733: All Bootstrap Blocks Auth Bypass Flaw

CVE-2025-54733 Overview

CVE-2025-54733 is a missing authorization vulnerability in the All Bootstrap Blocks WordPress plugin. The flaw affects all versions up to and including 1.3.28. It stems from incorrectly configured access control security levels, allowing unauthenticated network attackers to interact with functionality that should require privileged access [CWE-862].

The issue impacts integrity and availability at a limited scope, with no direct confidentiality impact. Exploitation requires no user interaction and no authentication, making the vulnerability accessible to any remote attacker able to reach the target WordPress site.

Critical Impact
Unauthenticated attackers can invoke restricted plugin functionality on WordPress sites running All Bootstrap Blocks <= 1.3.28, resulting in limited integrity and availability impact on the site.

Affected Products

All Bootstrap Blocks WordPress plugin (all-bootstrap-blocks) versions up to and including 1.3.28
WordPress installations with the vulnerable plugin active
Sites accessible over the network to unauthenticated clients

Discovery Timeline

2025-08-28 - CVE-2025-54733 published to the National Vulnerability Database
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-54733

Vulnerability Analysis

The vulnerability is a broken access control issue in the All Bootstrap Blocks plugin for WordPress. The plugin exposes functionality without enforcing the correct capability or nonce checks. As a result, requests from unauthenticated users are processed as if they came from a permitted role.

This maps to [CWE-862] Missing Authorization. The plugin registers endpoints or actions that assume the caller has been validated by an upstream layer, but no explicit current_user_can() or comparable check is performed inside the handler itself.

An attacker exploits the flaw by sending crafted HTTP requests to the WordPress site. The requests target plugin routes that should be limited to editors or administrators. Because authorization is absent, the server executes the requested action.

The EPSS score is 0.226% at the 13th percentile, indicating low observed exploitation activity. No public proof-of-concept or exploit code is currently available.

Root Cause

The root cause is the omission of authorization checks on plugin action handlers. WordPress plugins must independently verify user capabilities on every privileged endpoint, since AJAX and REST routes are reachable by any HTTP client. All Bootstrap Blocks up to 1.3.28 does not enforce this check consistently, allowing calls that bypass the intended access control boundary.

Attack Vector

The attack vector is network-based. An attacker sends HTTP requests directly to the vulnerable plugin endpoint on the target WordPress site. No credentials, session, or user interaction are required. Attackers can automate the request against large numbers of WordPress sites indexed by search engines or fingerprinting tools.

Refer to the Patchstack Vulnerability Report for endpoint specifics.

Detection Methods for CVE-2025-54733

Indicators of Compromise

Unauthenticated HTTP POST or GET requests to wp-admin/admin-ajax.php or REST routes registered by all-bootstrap-blocks
Unexpected modifications to Gutenberg block content or plugin-managed settings without a corresponding administrator login
Anomalous 200 OK responses to plugin endpoints from source IPs that never authenticated

Detection Strategies

Inspect web server access logs for repeated requests to plugin action names associated with All Bootstrap Blocks from unauthenticated sessions
Compare the installed plugin version against 1.3.28 across all WordPress instances in the environment
Correlate WordPress audit log entries showing configuration or content changes with the absence of a preceding successful login event

Monitoring Recommendations

Enable a WordPress activity logging plugin to record all admin-level actions and their originating user
Forward WordPress and web server logs to a centralized SIEM for correlation and retention
Alert on plugin action invocations that occur without an authenticated wordpress_logged_in_* cookie

How to Mitigate CVE-2025-54733

Immediate Actions Required

Inventory all WordPress sites running the All Bootstrap Blocks plugin and identify installations at version 1.3.28 or earlier
Update the plugin to the latest available version that addresses CVE-2025-54733
If a patched version is not yet deployable, deactivate and remove the plugin until the update can be applied
Review recent site content and configuration changes for signs of unauthorized modification

Patch Information

A fixed release is tracked by Patchstack. Consult the Patchstack Vulnerability Report for the current fixed version and upgrade guidance. Apply the update through the WordPress plugin manager or via WP-CLI.

Workarounds

Restrict access to wp-admin/admin-ajax.php and the WordPress REST API using a web application firewall rule scoped to the vulnerable plugin action names
Block unauthenticated requests to plugin-specific REST namespaces at the reverse proxy layer
Temporarily deactivate the All Bootstrap Blocks plugin on production sites until patching is complete

bash

# Update the plugin via WP-CLI
wp plugin update all-bootstrap-blocks

# Verify the installed version is above 1.3.28
wp plugin get all-bootstrap-blocks --field=version

# If a patched version is not yet available, deactivate the plugin
wp plugin deactivate all-bootstrap-blocks