CVE-2021-24171

CriticalCVSS 9.8/10Last modified Jun 17, 2026

Description

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.

Metrics

CVSS 3.1 9.8/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness enumeration

CWE-434

Affected software

Vendor	Product	Versions
Unknown	WooCommerce Upload Files	>= 59.4, < 59.4

References

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

Timeline

Published: Apr 5, 2021
Last modified: Jun 17, 2026
NVD status: Modified

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