What is CVE-2016-20027?

CVE-2016-20027 is a medium-severity vulnerability in Zkteco Inc. Zkbiosecurity, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-16.

How severe is CVE-2016-20027?

Medium severity. CVSS v3 base score is 6.1 out of 10.

XSS in Zkteco Inc. Zkbiosecurity

CVE-2016-20027

ZKTeco ZKBioSecurity 3.0 contains multiple reflected cross-site scripting vulnerabilities that allow attackers to execute arbitrary HTML and script code by injecting malicious payloads through unsanitized parameters in multiple scripts. Attackers can craft malicious URLs with XSS payloads in vulnerable parameters to execute scripts in a user's browser session within the context of the affected application.

Vulnerability class: XSS (Cross-Site Scripting)

EPSS: 0.002 (16.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 6.1 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N.

Affected products

Zkteco Inc. Zkbiosecurity — versions 3.0.1.0_R_230

Weakness classification (CWE)

CWE-79 — Cross-site Scripting

References

Zero Science Lab Disclosure (third-party-advisory)
CXSecurity (third-party-advisory)
IBM X-Force Exchange (vdb-entry)
Packet Storm Security (exploit)
VulnCheck Advisory: ZKTeco ZKBioSecurity 3.0 Multiple Reflected XSS Vulnerabilities (third-party-advisory)

Frequently asked questions

What is CVE-2016-20027?: CVE-2016-20027 is a medium-severity vulnerability in Zkteco Inc. Zkbiosecurity, classified under Cross-site Scripting. CVSS score: 6.1/10. Published 2026-03-16.
How severe is CVE-2016-20027?: Medium severity. CVSS v3 base score is 6.1 out of 10.