---
id: CVE-2026-19856
title: >-
  The All in One SEO WordPress plugin before 5.0.2.1 does not correctly
  determine which shortcodes are present in content derived from user input
  before deciding which ones to strip, allowing unauthenticated users to execute
  arbitrary shor…
summary: >-
  The All in One SEO WordPress plugin before 5.0.2.1 does not correctly
  determine which shortcodes are present in content derived from user input
  before deciding which ones to strip, allowing unauthenticated users to execute
  arbitrary shor…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N'
cwe:
  - CWE-74
product: All in One SEO
affected:
  - all_in_one_seo < 5.0.2.1
published: '2026-10-02'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T19:16:41.247'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-19856'
references:
  - url: 'https://wpscan.com/vulnerability/e35365d3-65de-45a7-9629-17aacd5299c7/'
    label: contact@wpscan.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-02T22:33:09.842Z'
---

## Overview

The All in One SEO WordPress plugin before 5.0.2.1 does not correctly determine which shortcodes are present in content derived from user input before deciding which ones to strip, allowing unauthenticated users to execute arbitrary shortcodes registered on the site. On sites upgraded from older versions the protection is disabled outright, making the issue reachable without any crafted input.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.