CVE-2025-12042: WordPress Course Booking Auth Bypass Flaw

CVE-2025-12042 Overview

CVE-2025-12042 is a missing authorization vulnerability in the Course Booking System plugin for WordPress. The flaw resides in the csv-export.php file and affects all versions up to and including 6.1.5. The file lacks a capability check, allowing unauthenticated attackers to request it directly over the network and download an export of all booking records. The issue is tracked under CWE-862: Missing Authorization.

Critical Impact
Unauthenticated remote attackers can retrieve a full CSV export of booking data, exposing personal information collected by the plugin.

Affected Products

Course Booking System plugin for WordPress
All versions up to and including 6.1.5
Sites exposing csv-export.php under the plugin directory

Discovery Timeline

2025-11-08 - CVE-2025-12042 published to the National Vulnerability Database (NVD)
2026-06-17 - Last updated in the NVD database

Technical Details for CVE-2025-12042

Vulnerability Analysis

The Course Booking System plugin exposes an export endpoint through the csv-export.php script. The script generates a comma-separated values (CSV) file containing booking records stored by the plugin. The endpoint is reachable directly over HTTP without going through a WordPress admin handler that would enforce authentication.

The root problem is a missing capability check. WordPress plugins are expected to gate administrative actions with functions such as current_user_can() or nonce validation via check_admin_referer(). Neither control is present on this export path. As a result, any anonymous requester can trigger the export and read the returned data.

Data typically stored by a booking plugin includes attendee names, email addresses, phone numbers, and course selections. Disclosure of this information carries privacy and regulatory consequences for site operators.

Root Cause

The csv-export.php file is directly accessible under the plugin directory and does not verify the caller's identity or permissions before writing booking records to the response. This maps to CWE-862: Missing Authorization.

Attack Vector

Exploitation requires only network access to the target WordPress site. An attacker issues an HTTP GET request to the plugin's csv-export.php path. The server responds with the generated CSV containing booking data. No credentials, user interaction, or elevated privileges are needed. See the Wordfence Vulnerability Report for additional detail.

No verified public proof-of-concept code is available. The vulnerability mechanism is described in prose because no realCodeExamples were provided for this CVE.

Detection Methods for CVE-2025-12042

Indicators of Compromise

HTTP requests to wp-content/plugins/course-booking-system/csv-export.php from unauthenticated sources
Web server access logs showing successful 200 responses to the export endpoint from unknown or foreign IP addresses
Outbound transfers of CSV content with Content-Type: text/csv originating from the plugin path

Detection Strategies

Search web server logs for any GET or POST requests targeting csv-export.php under the Course Booking System plugin directory
Correlate export requests with the absence of a valid authenticated WordPress session cookie
Flag repeated access patterns from a single IP address hitting the plugin export path

Monitoring Recommendations

Enable request logging on the WordPress front-end web server and forward logs to a centralized analytics or SIEM platform
Configure alerts on any access to plugin .php files that return CSV or other bulk data payloads
Review WordPress activity and access logs after applying patches to identify prior exposure

How to Mitigate CVE-2025-12042

Immediate Actions Required

Update the Course Booking System plugin to a version later than 6.1.5 as soon as the vendor releases a fixed build
Block external access to csv-export.php at the web server or web application firewall (WAF) level until patched
Audit web logs for prior unauthorized requests to the export endpoint and notify affected users if data was exfiltrated

Patch Information

Refer to the WordPress Plugin Change Log for the code change addressing this issue. Site administrators should apply the vendor update through the WordPress plugin manager once the fixed release is available.

Workarounds

Restrict access to the plugin directory via web server rules to allow only authenticated administrator IP ranges
Deploy a WAF rule blocking unauthenticated requests to csv-export.php
Temporarily deactivate the Course Booking System plugin if a patch is not yet installed

bash

# Example Apache rule to block direct access to the vulnerable export script
<Files "csv-export.php">
    Require all denied
</Files>