CVE-2026-16586

Contest Gallery <= 30.0.6 - Authenticated (Author+) Second-Order SQL Injection via MultipleFiles Second-Order Payload via 'cg_multiple_files_for_post' -> 'cgRealId'

2026-08-14 15:01
Wordfence PRISM

Strategic Overview

Status
Patched in 31.0.0
Affected Plugin
Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe
Affected Version
<= 30.0.7
CVSS
6.5Medium
Weakness type
CWE-89 · Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
CVE
CVE-2026-16586
View all Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe vulnerabilities

At a glance

CVE-2026-16586 is a medium-severity Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection') vulnerability in the Contest Gallery WordPress plugin, affecting versions <= 30.0.7. It carries a CVSS score of 6.5 (reachable over the network; low attack complexity; high confidentiality impact). Exploitation requires an authenticated account at Author level or above. The issue is fixed in version 31.0.0; sites on affected versions should update now. Disclosed August 2026, reported by Wordfence PRISM.

Vulnerability Overview

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.

Technical Analysis

The vector marks this flaw as remotely reachable over the network, with low attack complexity — no special timing or configuration is needed, and no interaction from a victim user. A successful exploit has high impact on confidentiality.

CWE-89: Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')

Contest Gallery <= 30.0.7 carries this weakness at cg_multiple_files_for_post, and reaching it takes an account at Author level or above. SQL injection happens when request data is concatenated into a query instead of being bound as a parameter, letting an attacker change the structure of the statement rather than just its values.

A working injection can read any table the database user can see, which on a WordPress install means user records, password hashes and session or API secrets stored in options. For Contest Gallery the fix is 31.0.0: builds <= 30.0.7 are affected, anything from 31.0.0 onward is not.

Remediation

Update to version 31.0.0, or a newer patched version

How does WordSec protect against this?

An attacker needs Author access first, so the firewall sees the attempt as traffic from a logged-in account: WordSec's web application firewall inspects request payloads before WordPress loads them. None of that substitutes for the fix: Contest Gallery 31.0.0 closes this, and updating the plugin is the step that ends it.

  • Firewall
  • Alerts

External References

https://www.cve.org/CVERecord?id=CVE-2026-16586https://www.wordfence.com/threat-intel/vulnerabilities/id/294e1822-b92c-48a4-bfc6-5a89cfbe0bc7https://nvd.nist.gov/vuln/detail/CVE-2026-16586

Related records

Vulnerability data © Defiant, Inc., provided under the Wordfence Intelligence T&C