Arbitrary file upload in Vanquish Woocommerce Upload Files
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.
Vulnerability class: Unrestricted File Upload
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.019 (78.9th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 78.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Vanquish Woocommerce Upload Files
- Woocommerce Upload Files — versions 59.4
Weakness classification (CWE)
Public proof-of-concept exploits
References
- wpscan.com/vulnerability/ed4288a1-f7e4-455f-b765-5ac343f87194 (Third Party Advisory)
- www.wordfence.com/blog/2021/03/critical-vulnerability-patched-in-woocommerce-up… (Third Party Advisory)
Frequently asked questions
- What is CVE-2021-24171?
- CVE-2021-24171 is a critical-severity vulnerability in Vanquish Woocommerce Upload Files, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 9.8/10. Published 2021-04-05.
- How severe is CVE-2021-24171?
- Critical severity. CVSS v3 base score is 9.8 out of 10.
- Is CVE-2021-24171 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.