What is CVE-2021-42338?

CVE-2021-42338 is a critical-severity vulnerability in 4mosan Gcb Doctor, classified under Improper Authorization. CVSS score: 9.8/10. Published 2021-11-19.

How severe is CVE-2021-42338?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in 4mosan Gcb Doctor

CVE-2021-42338

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.

EPSS: 0.056 (92.1th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

4mosan Gcb Doctor — versions unspecified
4mosan Gcb_doctor

Weakness classification (CWE)

CWE-285 — Improper Authorization
CWE-287 — Improper Authentication

References

twcert@cert.org.tw (Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-42338?: CVE-2021-42338 is a critical-severity vulnerability in 4mosan Gcb Doctor, classified under Improper Authorization. CVSS score: 9.8/10. Published 2021-11-19.
How severe is CVE-2021-42338?: Critical severity. CVSS v3 base score is 9.8 out of 10.