CVE-2025-26932: QuantumCloud ChatBot LFI Vulnerability

CVE-2025-26932 Overview

CVE-2025-26932 is a PHP Local File Inclusion (LFI) vulnerability in the QuantumCloud ChatBot plugin for WordPress, also known as WPBot. The flaw stems from improper control of filename input passed to PHP include or require statements, classified under [CWE-98]. An authenticated attacker with low privileges can manipulate file path parameters to include arbitrary local PHP files on the server. Successful exploitation leads to disclosure of sensitive files, execution of attacker-controlled PHP, and full compromise of the affected WordPress installation. The vulnerability affects all ChatBot plugin versions up to and including 6.3.5.

Critical Impact
Authenticated attackers can include local PHP files, leading to information disclosure and potential remote code execution on WordPress sites running ChatBot 6.3.5 or earlier.

Affected Products

QuantumCloud ChatBot (WPBot) plugin for WordPress, versions up to and including 6.3.5
WordPress installations with the ChatBot plugin activated
Hosting environments where the plugin processes user-supplied file path parameters

Discovery Timeline

2025-02-25 - CVE-2025-26932 published to NVD
2026-06-17 - Last updated in NVD database

Technical Details for CVE-2025-26932

Vulnerability Analysis

The vulnerability resides in the ChatBot plugin's handling of file path parameters supplied to PHP include or require statements. The plugin accepts user-controlled input and concatenates it into a filesystem path without sufficient validation or whitelisting. Although the CWE category references PHP Remote File Inclusion, the practical impact in this case is Local File Inclusion because allow_url_include is typically disabled in modern PHP configurations.

An authenticated attacker can traverse the filesystem and load arbitrary .php files accessible to the web server process. Where uploaded content can be coerced into PHP files, the inclusion chain extends to arbitrary code execution. The attack complexity is elevated because exploitation requires authenticated access and specific path conditions.

Root Cause

The root cause is improper neutralization of filename parameters before passing them to file inclusion functions. The plugin trusts request data that should be either validated against an allowlist or resolved through a fixed dispatcher. Without these controls, directory traversal sequences and absolute paths reach the include statement directly.

Attack Vector

Exploitation occurs over the network against the WordPress HTTP endpoint exposed by the ChatBot plugin. The attacker authenticates with at least low-privilege credentials, then issues a crafted request supplying a malicious file path. The vulnerable include statement loads the referenced file in the context of the WordPress PHP process. See the Patchstack WPBot Plugin Vulnerability advisory for technical references.

Detection Methods for CVE-2025-26932

Indicators of Compromise

HTTP requests to ChatBot plugin endpoints containing directory traversal patterns such as ../, ..\, or encoded variants like %2e%2e%2f
Web server access logs showing parameters referencing system files such as /etc/passwd, wp-config.php, or PHP wrapper schemes like php://filter
Unexpected PHP error log entries referencing include() or require() calls with paths outside the plugin directory
New or modified PHP files in upload directories that correlate with chatbot session activity

Detection Strategies

Inspect WordPress request logs for ChatBot plugin parameters carrying file path values or path traversal sequences
Deploy web application firewall (WAF) rules targeting LFI patterns against URIs that route to the ChatBot plugin
Correlate authenticated user activity with subsequent file read events on wp-config.php or other sensitive files
File integrity monitoring on the wp-content/plugins/chatbot/ directory and on writable upload paths

Monitoring Recommendations

Forward WordPress and PHP error logs to a centralized SIEM and alert on failed to open stream messages tied to include statements
Track outbound network connections from the PHP-FPM or web server process, which may indicate post-exploitation activity
Audit WordPress user accounts with subscriber or higher privileges for unusual login patterns preceding ChatBot requests
Monitor process creation under the web server account for shell interpreters such as sh, bash, or python

How to Mitigate CVE-2025-26932

Immediate Actions Required

Update the QuantumCloud ChatBot (WPBot) plugin to a version later than 6.3.5 as soon as a fixed release is available from the vendor
Disable or deactivate the ChatBot plugin on production sites until patching is complete
Rotate WordPress credentials and any secrets stored in wp-config.php if exploitation is suspected
Review installed plugins and uploaded files for unauthorized PHP webshells

Patch Information

The vendor advisory listed on Patchstack tracks the fix status for this issue. Administrators should consult the Patchstack WPBot Plugin Vulnerability advisory to confirm the patched version and upgrade path. Apply the update across all WordPress instances that have the plugin installed.

Workarounds

Restrict access to ChatBot plugin endpoints using .htaccess or web server access controls limited to trusted IP ranges
Configure PHP with open_basedir restrictions to confine includes to the WordPress installation directory
Verify that allow_url_include is set to Off in php.ini to block remote inclusion vectors
Apply WAF virtual patching that blocks path traversal sequences on plugin parameters until the official fix is deployed

bash

# php.ini hardening example
allow_url_include = Off
allow_url_fopen = Off
open_basedir = "/var/www/html:/tmp"