SQL Injection Vulnerability in Contest Gallery Plugin by WordPress
CVE-2026-8912

7.5HIGH

Key Information:

Vendor

WordPress
Status
Contest Gallery – Upload & Vote Photos, Media, Sell With Paypal & Stripe
Vendor
CVE Published:
19 May 2026

What is CVE-2026-8912?

The Contest Gallery plugin for WordPress allows unauthenticated attackers to exploit an SQL injection vulnerability through the 'form_input' parameter. This issue arises from inadequate escaping of user-supplied data within the 'post_cg_gallery_form_upload' AJAX action, particularly in the 'cb' branch of the users-upload-check.php file. This endpoint is accessible with only a basic frontend nonce available in any public gallery page source, enabling attackers to manipulate SQL queries. By injecting additional commands, they can potentially retrieve sensitive data from the database, compromising the integrity and confidentiality of affected WordPress sites.

Affected Version(s)

Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe 0 <= 28.1.6

References

https://www.wordfence.com/threat-intel/vulnerabilities/id...
https://plugins.trac.wordpress.org/browser/contest-galler...
https://plugins.trac.wordpress.org/browser/contest-galler...

CVSS V3.1

Score:
7.5
Severity:
HIGH
Confidentiality:
High
Integrity:
None
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Leonid Semenenko
.