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

No affected versions have been published.

Timeline

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

Related CVEs from 2021

CVE-2021-241724.3The VM Backups WordPress plugin through 1.0 does not have CSRF checks, allowing attackers to make a logged in user unwanted actions, such as CVE-2021-241736.1The VM Backups WordPress plugin through 1.0 does not have CSRF checks, allowing attackers to make a logged in user unwanted actions, such as CVE-2021-241748.1The Database Backups WordPress plugin through 1.2.2.6 does not have CSRF checks, allowing attackers to make a logged in user unwanted action CVE-2021-241759.8The Plus Addons for Elementor Page Builder WordPress plugin before 4.1.7 was being actively exploited to by malicious actors to bypass authe CVE-2021-241765.4The JH 404 Logger WordPress plugin through 1.1 doesn't sanitise the referer and path of 404 pages, when they are output in the dashboard, wh CVE-2021-241775.4In the default configuration of the File Manager WordPress plugin before 7.1, a Reflected XSS can occur on the endpoint /wp-admin/admin.php?CVE-2021-241788.8The Business Directory Plugin – Easy Listing Directories for WordPress WordPress plugin before 5.11.1 suffered from Cross-Site Request Forge CVE-2021-241798.8The Business Directory Plugin – Easy Listing Directories for WordPress WordPress plugin before 5.11 suffered from a Cross-Site Request Forge CVE-2021-24184.9Vulnerability in the MySQL Server product of Oracle MySQL (component: Server: Optimizer). Supported versions that are affected are 8.0.25 an CVE-2021-241805.4Unvalidated input and lack of output encoding within the Related Posts for WordPress plugin before 2.0.4 lead to a Reflected Cross-Site Scri CVE-2021-241816.5The tutor_mark_answer_as_correct AJAX action from the Tutor LMS – eLearning and online course solution WordPress plugin before 1.7.7 was vul CVE-2021-241826.5The tutor_quiz_builder_get_answers_by_question AJAX action from the Tutor LMS – eLearning and online course solution WordPress plugin before