What is CVE-2021-32541?

CVE-2021-32541 is a medium-severity vulnerability in Sysjust Cts Web, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-05-28.

How severe is CVE-2021-32541?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Auth bypass in Sysjust Cts Web

CVE-2021-32541

The CTS Web transaction system related to authentication and session management is implemented incorrectly, which allows remote unauthenticated attackers can send a large number of valid usernames, and force those logged-in account to log out, causing the user to be unable to access the services

Vulnerability class: Broken Authentication

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

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

EPSS exploit prediction

EPSS: 0.015 (73.6th percentile), scored 2026-10-07.

Low probability of exploitation in the next 30 days, but still tracked. 74th percentile — 73.6% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.015 · newest: 0.015 · 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-132-4757-893eb-1.html (Third Party Advisory)
www.chtsecurity.com/news/40e165e2-e539-49bc-bcf1-e3b27c29e344 (Third Party Advisory)

Frequently asked questions

What is CVE-2021-32541?: CVE-2021-32541 is a medium-severity vulnerability in Sysjust Cts Web, classified under Improper Authentication. CVSS score: 5.3/10. Published 2021-05-28.
How severe is CVE-2021-32541?: Medium severity. CVSS v3 base score is 5.3 out of 10.