# CVE-2026-8912: Contest Gallery <= 28.1.6 - Unauthenticated SQL Injection

> Unauthenticated attackers can exploit SQL injection in the Contest Gallery plugin to extract sensitive database information via the form_input parameter.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 19 May 2026
- **Updated:** 19 May 2026
- **Also known as:** GHSA-7v7x-p7vg-p2vc

## What is CVE-2026-8912?

CVE-2026-8912 is a high-severity SQL injection vulnerability in contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe, published on 19 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official 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.

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

## Which versions are affected by CVE-2026-8912?


## How do I fix CVE-2026-8912?

No fix has been published for CVE-2026-8912 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8912 being exploited?

There is no known exploitation of CVE-2026-8912 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8912 and fix it if it is affected.

What it is: CVE-2026-8912 is a high-severity SQL injection vulnerability in contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe, published on 19 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-8912 in the wild and no public exploit code.

Affected product: contest-gallery Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-8912/ (Markdown: https://insights.sbomify.com/CVE-2026-8912/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8912
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8912
- OSV: https://osv.dev/vulnerability/CVE-2026-8912

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-8912/
Summaries are generated and may contain mistakes; the official description above is the record.