Is CVE-2021-33224 actively exploited?

No active exploitation of CVE-2021-33224 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-33224 be exploited remotely?

Yes. CVE-2021-33224 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-33224?

CVE-2021-33224 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-33224

CWE-434Published: February 24, 2023· Updated: Jul 9, 2026

9.8

CVSS v3.1

Official Description

File upload vulnerability in Umbraco Forms v.8.7.0 allows unauthenticated attackers to execute arbitrary code via a crafted web.config and asp file.

NVD Source

Risk Analysis

Umbraco Forms v8.7.0 allows unauthenticated attackers to execute arbitrary code by uploading crafted web.config and ASP files. This critical flaw has a CVSS score of 9.8.

No public exploit is known, and the vulnerability is not in the KEV catalog.

Recommended Action

Upgrade Umbraco Forms to a secure version and restrict file upload types to prevent the execution of server-side scripts.

Generated by the CTIWATCH analysis pipeline from this CVE's metadata (CVSS, EPSS, KEV status, exploit intelligence). Verify against vendor advisories before acting.

Technical Analysis

CVE-2021-33224 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.