Is CVE-2021-45790 actively exploited?

No active exploitation of CVE-2021-45790 has been confirmed so far. Continue monitoring, as exploit status can change.

Can CVE-2021-45790 be exploited remotely?

Yes. CVE-2021-45790 is exploitable remotely over the network (CVSS attack vector: Network).

What is the CVSS score of CVE-2021-45790?

CVE-2021-45790 has a CVSS score of 9.8 (CRITICAL).

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CRITICAL

CVE-2021-45790

CWE-434Published: September 29, 2022· Updated: Jun 17, 2026

9.8

CVSS v3.1

Official Description

An arbitrary file upload vulnerability was found in Metersphere v1.15.4. Unauthenticated users can upload any file to arbitrary directory, where attackers can write a cron job to execute commands.

NVD Source

Risk Analysis

Metersphere is vulnerable to arbitrary file uploads, allowing unauthenticated attackers to upload malicious files. By uploading a cron job, an attacker can achieve remote code execution. This is a critical vulnerability that could lead to full server compromise.

No public exploit is known, and it is not in the CISA KEV. The vulnerability is remotely exploitable with low attack complexity.

Recommended Action

Upgrade to a patched version of Metersphere and restrict file upload permissions.

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-2021-45790 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.