---
id: CVE-2026-14995
title: >-
  The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via REQUEST_URI Path in all versions up to, and including, 3.1.15.1
  due to insufficient input sanitization and output escaping
summary: >-
  The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site
  Scripting via REQUEST_URI Path in all versions up to, and including, 3.1.15.1
  due to insufficient input sanitization and output escaping. This makes it
  possible for …
severity: high
cvss: 7.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-79
vendor: optimizingmatters
product: Autoptimize
affected:
  - Autoptimize <= 3.1.15.1
published: '2026-10-01'
updated: '2026-10-01'
sourceUpdated: '2026-10-01T09:17:08.967'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-14995'
references:
  - url: >-
      https://plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.15.1/classes/autoptimizeCriticalCSSEnqueue.php#L218
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.15.1/classes/autoptimizeCriticalCSSEnqueue.php#L57
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.15.1/classes/critcss-inc/admin_settings_queue.js.php#L125
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/browser/autoptimize/tags/3.1.15.1/classes/critcss-inc/admin_settings_queue.php#L82
    label: security@wordfence.com
  - url: >-
      https://plugins.trac.wordpress.org/changeset?reponame=&old=3713884%40autoptimize&new=3713884%40autoptimize
    label: security@wordfence.com
  - url: >-
      https://www.wordfence.com/threat-intel/vulnerabilities/id/1704cffa-75ed-415e-864f-de7ff8eea8dc?source=cve
    label: security@wordfence.com
tags:
  - nvd
  - cve.org
ingestedAt: '2026-10-01T09:41:14.154Z'
---

## Overview

The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via REQUEST_URI Path in all versions up to, and including, 3.1.15.1 due to insufficient input sanitization and output escaping. This makes it possible for unauthenticated attackers to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. Exploitation requires the Critical CSS feature to be active with a valid API key configured, as this is the precondition for unauthenticated frontend requests to trigger queue entries via ao_ccss_enqueue().

## Remediation

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