CVE-2021-42338 | BDVDB-2026-164673 Detail

4MOSAnGCB Doctor

Description#

4MOSAn GCB Doctor’s login page has improper validation of Cookie, which allows an unauthenticated remote attacker to bypass authentication by code injection in cookie, and arbitrarily manipulate the system or interrupt services by upload and execution of arbitrary files.

Impact#

Per CVSS v3.1: confidentiality impact high, integrity impact high, availability impact high. Attack vector: network.

Weaknesses#

CWE-285 Improper Authorization

References#

https://www.twcert.org.tw/tw/cp-132-5313-45bde-1.html

Exploit#

No public exploit known

History#

Version 12021-11-19Record published in the CVE List.
Version 22024-09-17Most recent update recorded in the CVE List.

Published

Published: 2021-11-19
Last modified: 2024-09-17

Vendor information

Vendor: 4MOSAn
Product: GCB Doctor

All 4MOSAn vulnerabilities

Score

9.8 Critical

EPSS

5.8%, Low

Estimated chance of exploitation in the next 30 days. EPSS percentile: 93.2.

KEV

Not listed in the CISA Known Exploited Vulnerabilities catalog.

Impact

Not classified

Action

No specific action is recorded in the source data. Check the references for vendor guidance.

Affected Systems

Vulnerable
<= 20210708(v2.0)
Fixed
Not stated

Scoring System

CVSS v4.0

Not available

CVSS v3.1

9.8 Critical

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

Metric breakdown
Attack Vector	Network
Attack Complexity	Low
Privileges Required	None
User Interaction	None
Scope	Unchanged
Confidentiality	High
Integrity	High
Availability	High

CVSS v3.0

Not available

CVSS v2

Not available

Source: CVE List v5 (record); CISA KEV (kev, action); FIRST EPSS (epss).