What is CVE-2026-1429?

CVE-2026-1429 is a medium-severity vulnerability in Wellchoose Single Sign-On Portal System, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-26.

How severe is CVE-2026-1429?

Medium severity. CVSS v3 base score is 5.4 out of 10.

XSS in Wellchoose Single Sign-On Portal System

CVE-2026-1429

Single Sign-On Portal System developed by WellChoose has a Reflected Cross-site Scripting vulnerability, allowing authenticated remote attackers to execute arbitrary JavaScript codes in user's browser through phishing attacks.

Vulnerability class: XSS (Cross-Site Scripting)

Published 2026-01-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N.

EPSS exploit prediction

EPSS: 0.002 (14.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 14th percentile — 14.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: +0.000

Affected products

Wellchoose Single Sign-On Portal System — versions 0
Wellchoose Single Sign-On Portal System

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

www.twcert.org.tw/tw/cp-132-10654-23f40-1.html (Third Party Advisory, third-party-advisory)
www.twcert.org.tw/en/cp-139-10655-59160-2.html (Third Party Advisory, third-party-advisory)

Frequently asked questions

What is CVE-2026-1429?: CVE-2026-1429 is a medium-severity vulnerability in Wellchoose Single Sign-On Portal System, classified under Cross-site Scripting. CVSS score: 5.4/10. Published 2026-01-26.
How severe is CVE-2026-1429?: Medium severity. CVSS v3 base score is 5.4 out of 10.