CVE-2021-44159

Gcb Doctor vulnerability

CVSS

9.8

EPSS

3.4%

EPSS pct

88th

Exploited

No known

4MOSAn GCB Doctor’s file upload function has improper user privilege control. A remote attacker can upload arbitrary files including webshell files without authentication and execute arbitrary code in order to perform arbitrary system operations or deny of service attack.

Affected vendor

4mosan

Affected product

Gcb Doctor

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Weakness type (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

Published

2021-12-20

Risk analysis

Based on its CVSS vector, this vulnerability is exploitable over the network, low attack complexity, requiring no privileges, no user interaction. Successful exploitation leads to high impact to confidentiality, high impact to integrity, high impact to availability.

Its EPSS score of 3.4% reflects a lower probability of exploitation activity in the wild over the next 30 days, placing it above 88% of all scored CVEs.

Check your external exposure to CVE-2021-44159

Confirm whether 4mosan Gcb Doctor is running on any internet-facing host or subdomain.
Match discovered service fingerprints against the version affected by CVE-2021-44159.
Prioritise remediation if the asset is public, business-critical, or near authentication/payment flows.

How ThreatPort helps with CVE-2021-44159

ThreatPort's external attack surface scanner checks your internet-facing assets — agentlessly, from the outside in — for the exposed services and versions that CVE-2021-44159 affects, then prioritises the finding by real risk using CISA KEV and FIRST.org EPSS.

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