---
id: "CVE-2026-66570"
kind: "vulnerability"
aliases: ["CVE-2026-66570"]
title: "WordPress File Upload plugin: stored XSS through version 5.2.1"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["package", "wordpress", "wp-file-upload"]
not_affected_if: ["plugin-not-installed"]
published_at: "2026-11-01T16:18:15+00:00"
first_seen_at: "2026-11-01T16:20:46+00:00"
updated_at: "2026-11-01T16:22:41+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-66570", "first_seen_at": "2026-11-01T16:20:46+00:00"}]
---

# WordPress File Upload plugin: stored XSS through version 5.2.1

The wp-file-upload WordPress plugin by Nickboss has a stored cross-site scripting flaw in versions up to 5.2.1. An attacker who can get script stored in the site can run it in other visitors' browsers, including administrators.

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

## How to check

- Check the installed version of WP File Upload (wp-file-upload) in the WordPress admin under Plugins.
- Confirm whether the plugin is active on the site.

## Fix

- WordPress File Upload: versions after `5.2.1` (the sources do not name a specific fixed version).

## Timeline

- 2026-11-01T16:20:46+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-66570

## From the sources

Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') vulnerability in Nickboss WordPress File Upload wp-file-upload allows Stored XSS.This issue affects WordPress File Upload: from n/a through 5.2.1.

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