What is CVE-2021-32543?

CVE-2021-32543 is a medium-severity vulnerability in Sysjust Cts Web, classified under Improper Authentication. CVSS score: 6.5/10. Published 2021-05-28.

How severe is CVE-2021-32543?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Auth bypass in Sysjust Cts Web

CVE-2021-32543

The CTS Web transaction system related to authentication management is implemented incorrectly. After login, remote attackers can manipulate cookies to access other accounts and trade in the stock market with spoofed identity.

Vulnerability class: Broken Authentication

Published 2021-05-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.008 (53.8th percentile), scored 2026-10-07.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 54th percentile — 53.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.008 · newest: 0.008 · change: 0.000

Affected products

Sysjust Cts Web — versions unspecified
Sysjust Cts Web

Weakness classification (CWE)

CWE-287 — Improper Authentication

References

www.twcert.org.tw/tw/cp-132-4759-92eab-1.html (Third Party Advisory)
www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-32543?: CVE-2021-32543 is a medium-severity vulnerability in Sysjust Cts Web, classified under Improper Authentication. CVSS score: 6.5/10. Published 2021-05-28.
How severe is CVE-2021-32543?: Medium severity. CVSS v3 base score is 6.5 out of 10.