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CVE-2026-8912

HIGH 7.5 CVSS 3.1
Published
May 19, 2026
Last modified
June 17, 2026
NVD status
Deferred
Reported by
security@wordfence.com
Weakness
CWE-89
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N

Description

The Contest Gallery plugin for WordPress is vulnerable to SQL Injection via the 'form_input' parameter in versions up to, and including, 28.1.6. This is due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query inside the unauthenticated 'post_cg_gallery_form_upload' AJAX action (specifically the 'cb' branch of the included users-upload-check.php, where $f_input_id is concatenated unquoted into 'SELECT Field_Content FROM ... WHERE id = $f_input_id'). The endpoint is gated only by a public frontend nonce ('cg1l_action' / 'cg_nonce') that is exposed in the page source of any public gallery page. This makes it possible for unauthenticated attackers to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

Affected WordPress components

  • Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe Plugin · contest-gallery
    Confirmed match Active
    Up to and including 28.1.6
    View on WordPress.org

A confirmed match is backed by the plugin or theme slug. A possible match is based on the product name only and should be verified.

Affected products and versions

  • contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe — Up to and including 28.1.6

References

  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.1.5/ajax/ajax-functions-frontend.php#L837
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.1.5/functions/frontend/cg-general-frontend.php#L12
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.1.5/v10/v10-frontend/user_upload/users-upload-check.php#L1036
  • plugins.trac.wordpress.org https://plugins.trac.wordpress.org/browser/contest-gallery/tags/28.1.5/v10/v10-frontend/user_upload/users-upload-check.php#L1193
  • www.wordfence.com https://www.wordfence.com/threat-intel/vulnerabilities/id/71f2f8c4-00ee-4ab4-b0e0-9ddac46818b3?source=cve
  • nvd.nist.gov Official NVD record