CVE-2021-22856Network attack vector

Unauthenticated database access via Cookie parameter injection

Published Feb 17, 2021 · Updated Sep 17, 2024

SQL injection in ChanGate Property Management System 1.00 and earlier allows remote attackers to retrieve database data through Cookie parameters. The application incorporates attacker-controlled Cookie parameter values into database query strings without neutralizing SQL syntax. No authentication or user interaction is required, and crafted queries can also bypass the login page.

CVSS severity9.8
Critical
EPSS probability1.47%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

SQL injection in ChanGate Property Management System 1.00 and earlier allows remote attackers to retrieve database data through Cookie parameters. The application incorporates attacker-controlled Cookie parameter values into database query strings without neutralizing SQL syntax. No authentication or user interaction is required, and crafted queries can also bypass the login page.

The record

CVE
CVE-2021-22856
Published
Feb 17, 2021
Updated
Sep 17, 2024
Vendor
ChanGate EnterPrise Co., Ltd
Product
Property Management System
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 17, 2021CVE publishedPublication date reported by the CVE source.
  2. Sep 17, 2024Record 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=0 <=1.00

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

ChanGate EnterPrise Co., Ltd · Property Management Systemversion=0 <=1.00

Published CVSS scores

7.5NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
9.8TWCERT/CCCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
5.0NIST NVDAV:N/AC:L/Au:N/C:P/I:N/A: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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

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Technologies

Your stack

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Your stack

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