CVE-2021-47743Public exploitNetwork attack vector

Browser script execution via reflected cookie values

Published Dec 31, 2025 · Updated Dec 31, 2025

Reflected XSS in COMMAX Biometric Access Control System 1.0.0 allows remote attackers to run scripts through crafted cookie values. The web interface places CMX_ADMIN_NM and CMX_COMPLEX_NM cookie contents into generated HTML without neutralizing script markup. Exploitation requires a victim to load a request carrying the crafted cookies; successful code runs in that victim's browser session and can read or alter session-visible data.

CVSS severity5.1
Medium
EPSS probability0.28%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Reflected XSS in COMMAX Biometric Access Control System 1.0.0 allows remote attackers to run scripts through crafted cookie values. The web interface places CMX_ADMIN_NM and CMX_COMPLEX_NM cookie contents into generated HTML without neutralizing script markup. Exploitation requires a victim to load a request carrying the crafted cookies; successful code runs in that victim's browser session and can read or alter session-visible data.

The record

CVE
CVE-2021-47743
Published
Dec 31, 2025
Updated
Dec 31, 2025
Vendor
COMMAX
Product
COMMAX Biometric Access Control System
Classifications
CWE-79, T1203
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Dec 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Dec 31, 2025Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.0.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

COMMAX · COMMAX Biometric Access Control Systemversion=1.0.0

Published CVSS scores

6.1VulnCheckCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
5.1VulnCheckCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-79Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')
T1203Exploitation for Client Execution

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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