CVE-2026-78088

Contest Gallery <= 32.0.1 - Unauthenticated Arbitrary File Upload via 'baseUrlForFacebook' Parameter

2026-09-15 15:10

Strategic Overview

Status: Patched in 33.0.0
Affected Plugin: Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe
Affected Version: <= 32.0.1
CVSS: 8.8High
Weakness type: CWE-434 · Unrestricted Upload of File with Dangerous Type
CVE: CVE-2026-78088

View all Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe vulnerabilities

At a glance

CVE-2026-78088 is a high-severity Unrestricted Upload of File with Dangerous Type vulnerability in the Contest Gallery WordPress plugin, affecting versions <= 32.0.1. It carries a CVSS score of 8.8 (reachable over the network; low attack complexity; high confidentiality, integrity, availability impact). Exploitation requires no authentication. The issue is fixed in version 33.0.0; sites on affected versions should update now. Disclosed September 2026, reported by mad4cyber.

Vulnerability Overview

The Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe plugin for WordPress is vulnerable to Unauthenticated Arbitrary File Overwrite in all versions up to, and including, 32.0.1 due to insufficient file path validation in the 'baseUrlForFacebook' parameter. This makes it possible for authenticated attackers, with subscriber-level access and above, to overwrite known files which may lead to remote code execution when certain preconditions are met.

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, integrity, availability — full site compromise territory.

CWE-434: Unrestricted Upload of File with Dangerous Type

Contest Gallery <= 32.0.1 carries this weakness at baseUrlForFacebook, and reaching it takes no account at all. An unrestricted file upload lets a caller store a file whose type or destination the application does not properly constrain.

If an uploaded file lands anywhere the server will execute, the flaw becomes remote code execution and the site should be treated as fully compromised. For Contest Gallery the fix is 33.0.0: builds <= 32.0.1 are affected, anything from 33.0.0 onward is not.

Remediation

Update to version 33.0.0, or a newer patched version

How does WordSec protect against this?

Requests carrying this pattern arrive without a session, so nothing upstream of the firewall gets a chance to reject them: WordSec's web application firewall inspects request payloads before WordPress loads them. Classes like this one can leave something behind, so the staged malware scanner is the second half: it looks for dropped files and modified code rather than for the request that created them. None of that substitutes for the fix: Contest Gallery 33.0.0 closes this, and updating the plugin is the step that ends it.

Firewall
Scanner
Login Security

External References

https://www.cve.org/CVERecord?id=CVE-2026-78088 https://www.wordfence.com/threat-intel/vulnerabilities/id/af2115ba-5573-41ce-8d5a-58c57c65c75a https://nvd.nist.gov/vuln/detail/CVE-2026-78088

Related records

Other vulnerabilities in Contest Gallery – Upload & Vote Photos, Media, Sell with PayPal & Stripe

CVSS Vector

8.8

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

Base

Attack VectorNetwork
Attack ComplexityLow
Privileges RequiredLow
User InteractionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh

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