Autoptimize <= 3.1.6 - Authenticated (Admin+) Stored Cross-Site Scripting via Critical CSS Rules

4.4
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2023-2113
CVSS 4.4 (Medium)
Publicly Published April 25, 2023
Last Updated January 22, 2024
Researcher Juampa Rodríguez

Description

The Autoptimize plugin for WordPress is vulnerable to Stored Cross-Site Scripting via the critical css rules in versions up to, and including, 3.1.6 due to insufficient input sanitization and output escaping. This makes it possible for authenticated attackers, with administrator-level permissions and above, to inject arbitrary web scripts in pages that will execute whenever a user accesses an injected page. This only affects multi-site installations and installations where unfiltered_html has been disabled.

Learn more about Cross-Site Scripting vulnerabilities and how to prevent them.

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Vulnerability Details for Autoptimize

Software Type Plugin
Software Slug autoptimize (view on wordpress.org)
Patched? Yes
Remediation Update to version 3.1.7, or a newer patched version
Affected Version
  • <= 3.1.6
Patched Version
  • 3.1.7

Recent vulnerabilities in Autoptimize

# Title CVE ID CVSS Researchers Date
1 Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via 'ao_post_preload' Meta Value CVE-2026-2352 6.4 bashu March 20, 2026
2 Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via Lazy-loaded Image Attributes CVE-2026-2430 6.4 stealthcopter March 20, 2026
3 Autoptimize <= 3.1.13 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2025-13401 6.4 Muhammad Yudha - DJ December 3, 2025
4 Autoptimize <= 3.0.4 - Sensitive Information Disclosure CVE-2022-4057 5.3 Raad Haddad December 5, 2022
5 Autoptimize <= 3.1.0 - Authenticated (Admin+) Stored Cross-Site Scripting via Critical CSS Settings CVE-2022-2635 5.5 Raad Haddad July 19, 2022
6 Autoptimize <= 2.8.3 - Stored Cross-Site Scripting CVE-2021-24332 5.5 R3N0 May 7, 2021
7 Autoptimize <= 2.7.7 - Arbitrary File Upload (and Remote Code Execution) via Import Settings CVE-2021-24376 9.8 Marcin Węgłowski October 9, 2020
8 Autoptimize <= 2.7.7 - Unsafe File Upload to Cross-Site Scripting CVE-2021-24378 4.8 Marcin Węgłowski October 9, 2020
9 Autoptimize <= 2.7.7 - Race Condition leading to Remote Code Execution CVE-2021-24377 8.1 Marcin Węgłowski October 9, 2020
10 Autoptimize <= 2.7.6 - Authenticated Arbitrary File Upload CVE-2020-24948 7.2 Nguyen Van Khanh August 24, 2020

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