Is CVE-2021-47940 actively exploited?

No active exploitation of CVE-2021-47940 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-47940 be exploited remotely?

Yes. CVE-2021-47940 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-47940?

CVE-2021-47940 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-47940

CWE-306Published: May 10, 2026· Updated: May 12, 2026

9.8

CVSS v3.1

EPSS:0.11%probability of exploitation in 30 daysPercentile:29.4th

Official Description

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.

NVD Source

Technical Analysis

CVE-2021-47940 can be exploited remotely over the network without requiring physical or adjacent access, significantly expanding the attack surface for threat actors.

The vulnerability requires no privileges and no user interaction, making it a prime target for automated exploitation campaigns and worm-like propagation.

A successful exploit results in complete confidentiality breach (data exposure), full integrity compromise (data manipulation), availability disruption (denial of service), with a CVSS base score of 9.8.