CVE-2026-8912 json
Contest Gallery <= 28.1.6 - Unauthenticated SQL Injection
published 2026-05-19 5 mo ago modified 2026-06-17 4 mo ago also EUVD-2026-30893
- cvss
- 7.5
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.4%
- EPSS 0.4% chance of exploitation in 30 days, percentile 33%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- none
- Automatable
- yes
- Technical impact
- partial
- Assessed
- 5 mo ago
Exploit prediction
0.39% chance of exploitation in the next 30 days, higher than 33% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 3.1 | 7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Affected products
- contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe
Classification
- Weakness
-
- CWE-89 Improper Neutralization of Special Elements used in an SQL Command
- Technology feeds
References
- wordfence.com /threat-intel/vulnerabilities/id/71f2f8c4-00ee-4ab4-b0e0-9ddac46818b3?source=cve
- plugins.trac.wordpress.org /browser/contest-gallery/tags/28.1.5/v10/v10-frontend/user_upload/users-upload-check.php#L1193
- 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 /browser/contest-gallery/tags/28.1.5/ajax/ajax-functions-frontend.php#L837
- plugins.trac.wordpress.org /browser/contest-gallery/tags/28.1.5/functions/frontend/cg-general-frontend.php#L12
Sources
- CVE List CVE-2026-8912
- NVD CVE-2026-8912
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.
CPEs and fixed versions use Anchore's correction of NVD's data: Added CPE configurations because not yet analyzed by NVD.