Atomic Edge analysis of CVE-2026-27406:
The My Tickets WordPress plugin prior to version 2.1.1 contains an unauthenticated information exposure vulnerability in its receipt viewing functionality. This vulnerability allows any unauthenticated user to access sensitive purchase data, including user information and payment details, by manipulating the receipt_id parameter. The CVSS score of 5.3 reflects moderate severity due to the confidentiality impact without requiring authentication.

Atomic Edge research identified the root cause in the mt_receipt() function within /my-tickets/mt-receipt.php. The function processes receipt requests through the receipt_id GET parameter without proper authorization checks. Prior to patching, the function only verified the receipt_id parameter existed (line 19) before loading the receipt template (lines 20-26). The vulnerable code path allowed direct access to receipt data through the /?receipt_id={hash} endpoint on the configured receipt page.

The exploitation method involves an attacker accessing the plugin’s receipt page with a manipulated receipt_id parameter. The attacker can brute-force or guess valid receipt hashes to extract purchase information. The attack vector uses HTTP GET requests to the WordPress site’s receipt page (typically a page with the [mt_receipt] shortcode) with the receipt_id parameter containing a valid MD5 hash of a purchase receipt. No authentication or session tokens are required for successful exploitation.

Atomic Edge analysis confirms the patch implements multiple authorization layers. The fix adds three verification methods in mt-receipt.php lines 20-34: cookie validation using mt_set_receipt_cookie() and mt_get_payment_log_id(), time-based validation (10-minute window), and email verification through a new mt-verify.php template. The patch introduces the mt_get_payment_log_id() function in mt-cpt.php lines 45-56 to generate a unique receipt identifier combining the receipt hash and payment log data. The receipt template now only loads after passing one of three checks: valid cookie within 10 minutes, administrative privileges (mt-view-reports capability), or successful email verification via the new verification form.

Successful exploitation exposes sensitive purchase data including customer email addresses, payment amounts, ticket quantities, event details, and potentially custom form data submitted during checkout. While the vulnerability does not enable direct privilege escalation or remote code execution, the exposed information could facilitate social engineering attacks, payment fraud, or be combined with other vulnerabilities for more severe attacks. The data exposure violates user privacy expectations and may conflict with data protection regulations.