Autoptimize <= 2.7.7 - Race Condition leading to Remote Code Execution

8.1
Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CVE CVE-2021-24377
CVSS 8.1 (High)
Publicly Published October 9, 2020
Last Updated January 22, 2024
Researcher Marcin Węgłowski

Description

The Autoptimize WordPress plugin before 2.7.8 attempts to remove potential malicious files from the extracted archive uploaded via the 'Import Settings' feature, however this is not sufficient to protect against RCE as a race condition can be achieved in between the moment the file is extracted on the disk but not yet removed. It is a bypass of CVE-2020-24948.

References

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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 Multiple Plugins <= Multiple Versions - Unauthenticated Stored Cross-Site Scripting CVE-2026-3220 7.2 stealthcopter, WPscan April 27, 2026
2 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
3 Autoptimize <= 3.1.14 - Authenticated (Contributor+) Stored Cross-Site Scripting via Lazy-loaded Image Attributes CVE-2026-2430 6.4 stealthcopter March 20, 2026
4 Autoptimize <= 3.1.13 - Authenticated (Contributor+) Stored Cross-Site Scripting CVE-2025-13401 6.4 Muhammad Yudha - DJ December 3, 2025
5 Autoptimize <= 3.1.6 - Authenticated (Admin+) Stored Cross-Site Scripting via Critical CSS Rules CVE-2023-2113 4.4 Juampa Rodríguez April 25, 2023
6 Autoptimize <= 3.0.4 - Sensitive Information Disclosure CVE-2022-4057 5.3 Raad Haddad December 5, 2022
7 Autoptimize <= 3.1.0 - Authenticated (Admin+) Stored Cross-Site Scripting via Critical CSS Settings CVE-2022-2635 5.5 Raad Haddad July 19, 2022
8 Autoptimize <= 2.8.3 - Stored Cross-Site Scripting CVE-2021-24332 5.5 R3N0 May 7, 2021
9 Autoptimize <= 2.7.7 - Arbitrary File Upload (and Remote Code Execution) via Import Settings CVE-2021-24376 9.8 Marcin Węgłowski October 9, 2020
10 Autoptimize <= 2.7.7 - Unsafe File Upload to Cross-Site Scripting CVE-2021-24378 4.8 Marcin Węgłowski October 9, 2020

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