CVE-2026-16586

medium

Description

The Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe plugin for WordPress is vulnerable to Second-Order SQL Injection via MultipleFiles Second-Order Payload via 'cg_multiple_files_for_post' -> 'cgRealId' in all versions up to, and including, 30.0.7 due to insufficient escaping on the user supplied parameter and lack of sufficient preparation on the existing SQL query. This makes it possible for authenticated attackers, with author-level access and above, to append additional SQL queries into already existing queries that can be used to extract sensitive information from the database.

References

https://www.wordfence.com/threat-intel/vulnerabilities/id/294e1822-b92c-48a4-bfc6-5a89cfbe0bc7?source=cve

https://plugins.trac.wordpress.org/changeset?reponame=&old=3631928%40contest-gallery&new=3631928%40contest-gallery

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.7/v10/v10-admin/gallery/change-gallery/0_change-gallery.php#L683

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.7/v10/v10-admin/gallery/change-gallery/0_change-gallery.php#L475

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.7/ajax/ajax-functions-backend.php#L310

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.7/ajax/ajax-functions-backend.php#L286

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.7/ajax/ajax-functions-backend.php#L135

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.6/v10/v10-admin/gallery/change-gallery/0_change-gallery.php#L683

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.6/v10/v10-admin/gallery/change-gallery/0_change-gallery.php#L475

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.6/ajax/ajax-functions-backend.php#L310

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.6/ajax/ajax-functions-backend.php#L286

https://plugins.trac.wordpress.org/browser/contest-gallery/tags/30.0.6/ajax/ajax-functions-backend.php#L135

Details

Source: Mitre, NVD

Published: 2026-08-15

Updated: 2026-08-15

Risk Information

CVSS v2

Base Score: 6.8

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:N/A:N

Severity: Medium

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Severity: Medium

EPSS

EPSS: 0.00328