Autoptimize <= 2.7.7 - Unsafe File Upload to Cross-Site Scripting

4.8
Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
CVE CVE-2021-24378
CVSS 4.8 (Medium)
Publicly Published October 9, 2020
Last Updated January 22, 2024
Researcher Marcin Węgłowski

Description

The Autoptimize WordPress plugin before 2.7.8 does not check for malicious files such as .html in the archive uploaded via the 'Import Settings' feature. As a result, it is possible for a high privilege user to upload a malicious file containing JavaScript code inside an archive which will execute when a victim visits index.html inside the plugin directory.

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 2.7.8, or a newer patched version
Affected Version
  • < 2.7.8
Patched Version
  • 2.7.8

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 <= 3.1.6 - Authenticated (Admin+) Stored Cross-Site Scripting via Critical CSS Rules CVE-2023-2113 4.4 Juampa Rodríguez April 25, 2023
5 Autoptimize <= 3.0.4 - Sensitive Information Disclosure CVE-2022-4057 5.3 Raad Haddad December 5, 2022
6 Autoptimize <= 3.1.0 - Authenticated (Admin+) Stored Cross-Site Scripting via Critical CSS Settings CVE-2022-2635 5.5 Raad Haddad July 19, 2022
7 Autoptimize <= 2.8.3 - Stored Cross-Site Scripting CVE-2021-24332 5.5 R3N0 May 7, 2021
8 Autoptimize <= 2.7.7 - Arbitrary File Upload (and Remote Code Execution) via Import Settings CVE-2021-24376 9.8 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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