CVE-2021-24171

The WooCommerce Upload Files WordPress plugin before 59.4 ran a single sanitization pass to remove blocked extensions such as .php. It was possible to bypass this and upload a file with a PHP extension by embedding a "blocked" extension within another "blocked" extension in the "wcuf_file_name" parameter. It was also possible to perform a double extension attack and upload files to a different location via path traversal using the "wcuf_current_upload_session_id" parameter.

• CWE-434
• CWE-434

• https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194Third Party Advisory
• https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/Third Party Advisory
• https://wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194Third Party Advisory
• https://www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-upload-files/Third Party Advisory

Published

Apr 5, 2021

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
• Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
• PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
• AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.

• CVE-2021-24166The wp_ajax_nf_oauth_disconnect from the Ninja Forms Contact…5.4
• CVE-2021-24167When visiting a site running Web-Stat < 1.4.0, the "wts_web_…7.5
• CVE-2021-24168The Easy Contact Form Pro WordPress plugin before 1.1.1.9 di…5.4
• CVE-2021-24169This Advanced Order Export For WooCommerce WordPress plugin …6.1
• CVE-2021-2417Vulnerability in the MySQL Server product of Oracle MySQL (c…6
• CVE-2021-24170The REST API endpoint get_users in the User Profile Picture …7.5
• CVE-2021-24172The VM Backups WordPress plugin through 1.0 does not have CS…4.3
• CVE-2021-24173The VM Backups WordPress plugin through 1.0 does not have CS…6.1
• CVE-2021-24174The Database Backups WordPress plugin through 1.2.2.6 does n…8.1
• CVE-2021-24175The Plus Addons for Elementor Page Builder WordPress plugin …9.8
• CVE-2021-24176The JH 404 Logger WordPress plugin through 1.1 doesn't sanit…5.4
• CVE-2021-24177In the default configuration of the File Manager WordPress p…5.4