CVE-2025-53210: ZoloBlocks PHP File Inclusion Vulnerability

CVE-2025-53210 Overview

CVE-2025-53210 is a Local File Inclusion (LFI) vulnerability in the bdthemes ZoloBlocks WordPress plugin. The flaw stems from improper control of filenames passed to PHP include or require statements, classified under [CWE-98]. All versions of ZoloBlocks up to and including 2.3.2 are affected. An authenticated attacker with low privileges can manipulate file path parameters to include arbitrary local files on the server. Successful exploitation leads to disclosure of sensitive files, execution of PHP code from attacker-controlled files, and potential full site compromise.

Critical Impact
Authenticated attackers can include arbitrary local PHP files, leading to information disclosure, code execution, and compromise of WordPress sites running ZoloBlocks ≤ 2.3.2.

Affected Products

bdthemes ZoloBlocks WordPress plugin, all versions through 2.3.2
WordPress sites with ZoloBlocks installed and active
PHP environments hosting the vulnerable plugin

Discovery Timeline

2025-08-20 - CVE-2025-53210 published to NVD
2026-04-23 - Last updated in NVD database

Technical Details for CVE-2025-53210

Vulnerability Analysis

The vulnerability resides in the ZoloBlocks plugin code where user-supplied input flows into PHP include or require statements without sufficient validation. PHP file inclusion functions execute the contents of any file they load, treating the contents as PHP code. When attacker-controlled data reaches these functions, the attacker can redirect the inclusion to unintended files on the local filesystem.

The issue is categorized as PHP Remote File Inclusion at the CWE level but manifests in this plugin as Local File Inclusion. Attackers can read sensitive configuration files such as wp-config.php, exposing database credentials and WordPress secret keys. If an attacker can upload or stage a file with PHP content on the server, inclusion of that file results in remote code execution.

The attack requires authenticated access with low privileges. The high attack complexity rating reflects conditions an attacker must satisfy beyond simple request crafting.

Root Cause

The root cause is missing or inadequate sanitization of a filename parameter that is concatenated into an include or require call. The plugin trusts a request parameter to identify a template or module file and does not enforce an allowlist of permitted paths. Path traversal sequences such as ../ are not stripped, allowing the inclusion target to escape the intended directory.

Attack Vector

The attacker authenticates to the WordPress instance with at least a low-privilege account. The attacker then sends a crafted HTTP request to a ZoloBlocks endpoint, passing a manipulated filename value that resolves to an arbitrary file path on the host. PHP loads and parses the targeted file, returning its contents or executing embedded PHP. Refer to the Patchstack advisory for CVE-2025-53210 for technical details.

Detection Methods for CVE-2025-53210

Indicators of Compromise

HTTP requests to ZoloBlocks plugin endpoints containing path traversal sequences such as ../ or encoded variants like %2e%2e%2f
Web server access logs showing parameters referencing sensitive paths such as wp-config.php, /etc/passwd, or /proc/self/environ
Unexpected PHP errors in logs referencing failed include or require calls from ZoloBlocks plugin files
New or modified PHP files in upload directories that coincide with suspicious inclusion requests

Detection Strategies

Inventory WordPress installations and identify hosts running ZoloBlocks at version 2.3.2 or earlier
Inspect web access logs for ZoloBlocks request parameters containing directory traversal patterns or absolute file paths
Correlate authenticated user sessions with anomalous parameter values targeting the plugin
Apply web application firewall rules that detect LFI patterns in plugin query strings and POST bodies

Monitoring Recommendations

Forward WordPress, PHP, and web server logs to a centralized analytics platform for correlation
Alert on PHP include or require failures originating from plugin directories
Monitor file integrity on wp-content/plugins/zoloblocks/ and the WordPress core directory for unauthorized changes
Track creation of new PHP files in wp-content/uploads/ and other writable paths

How to Mitigate CVE-2025-53210

Immediate Actions Required

Identify all WordPress sites with ZoloBlocks installed and confirm the installed version
Update ZoloBlocks to a version newer than 2.3.2 once a patched release is available from bdthemes
Deactivate and remove the ZoloBlocks plugin if a patched version is not available and the plugin is not essential
Rotate WordPress secret keys and database credentials if log review indicates inclusion of wp-config.php

Patch Information

The vulnerability affects ZoloBlocks versions through 2.3.2. Consult the Patchstack vulnerability database entry for the current patch status and upgrade guidance from bdthemes.

Workarounds

Restrict access to WordPress administrative and contributor accounts by enforcing strong authentication and multi-factor authentication
Deploy a web application firewall rule blocking path traversal patterns in requests to ZoloBlocks endpoints
Configure PHP open_basedir to limit which directories scripts can access, reducing the impact of arbitrary inclusion
Set restrictive filesystem permissions on wp-config.php and other sensitive files

bash

# Configuration example: restrict PHP file access using open_basedir in php.ini
open_basedir = "/var/www/html/:/tmp/"

# Disable dangerous PHP functions if not required by the application
disable_functions = "exec,passthru,shell_exec,system,proc_open,popen"

# Apache: block path traversal in query strings targeting the plugin
# Place in the site's VirtualHost or .htaccess
RewriteEngine On
RewriteCond %{QUERY_STRING} (\.\./|%2e%2e%2f) [NC]
RewriteRule ^wp-content/plugins/zoloblocks/ - [F,L]