Is CVE-2021-38384 actively exploited?

No active exploitation of CVE-2021-38384 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-38384 be exploited remotely?

Yes. CVE-2021-38384 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-38384?

CVE-2021-38384 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-38384

CWE-755Published: August 10, 2021· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

Serverless Offline 8.0.0 returns a 403 HTTP status code for a route that has a trailing / character, which might cause a developer to implement incorrect access control, because the actual behavior within the Amazon AWS environment is a 200 HTTP status code (i.e., possibly greater than expected permissions).

NVD Source

Technical Analysis

CVE-2021-38384 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.