---
id: "CVE-2026-111837"
kind: "vulnerability"
aliases: ["CVE-2026-111837"]
title: "Contest Gallery WordPress plugin: stored XSS through unsanitized input"
severity: "medium"
cvss: 6.5
epss: 0.0018
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["contest-gallery", "package", "wordpress"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-10-21T15:17:15+00:00"
first_seen_at: "2026-10-23T21:57:28+00:00"
updated_at: "2026-10-25T03:49:03+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-111837", "first_seen_at": "2026-10-23T21:57:28+00:00"}, {"source": "epss", "url": "https://api.first.org/data/v1/epss?cve=CVE-2026-111837", "first_seen_at": "2026-10-24T13:15:54+00:00"}]
---

# Contest Gallery WordPress plugin: stored XSS through unsanitized input

Contest Gallery, a WordPress plugin by Wasiliy Strecker, fails to neutralize input before writing it into web pages, so it stores attacker-supplied script. A visitor whose browser loads the affected page can have script run in the context of the site.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed version of the Contest Gallery plugin (contest-gallery) in the WordPress admin under Plugins, or in `wp-content/plugins/contest-gallery/`.
- unknown for anything beyond the version range, as the sources do not give more detail.

## Fix

- Update Contest Gallery (contest-gallery) to a version later than `34.0.1`; the sources do not name the first fixed release.
- unknown for any interim workaround.

## Timeline

- 2026-10-23T21:57:28+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-111837
- 2026-10-24T13:15:54+00:00 epss https://api.first.org/data/v1/epss?cve=CVE-2026-111837

## From the sources

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Wasiliy Strecker Contest Gallery contest-gallery allows Stored XSS.This issue affects Contest Gallery: from n/a through 34.0.1.

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_Free to read at a human pace. An API with keys and an MCP server are in preparation; early access: hello@infrastack.ai_