Auth bypass in Download-From-Files Download From Files
CVE-2021-47940
WordPress Plugin Download From Files version 1.48 and earlier contains an arbitrary file upload vulnerability that allows unauthenticated attackers to upload malicious files by exploiting the AJAX fileupload action. Attackers can send POST requests to the admin-ajax.php endpoint with the download_from_files_617_fileupload action, manipulating the allowExt parameter to bypass file type restrictions and upload executable files like PHP shells to the web root.
Vulnerability class: Broken Authentication
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: 0.004 (31.2th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 31st percentile — 31.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.004 · change: 0.000
Affected products
- Download-From-Files Download From Files — versions 0
Weakness classification (CWE)
References
- www.exploit-db.com/exploits/50287 (exploit)
- wordpress.org/plugins/download-from-files/ (product)
- www.vulncheck.com/advisories/wordpress-download-from-files-arbitrary-file-upload (third-party-advisory)
Frequently asked questions
- What is CVE-2021-47940?
- CVE-2021-47940 is a critical-severity vulnerability in Download-From-Files Download From Files, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-05-10.
- How severe is CVE-2021-47940?
- Critical severity. CVSS v3 base score is 9.8 out of 10.