CVE-2023-3305Public exploitNetwork attack vector

Unauthenticated account creation via unchecked user handler

Published Jun 18, 2023 · Updated Aug 2, 2024

Improper access control in C-DATA Web Management System 20230607 and earlier allows remote attackers to create arbitrary user accounts. The user-creation handler accepts unauthenticated POST values for user, level, and newpassword and creates the supplied account without a session cookie. Network access to the web interface is sufficient, and the new account provides persistent access at the attacker-selected level.

CVSS severity7.5
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in C-DATA Web Management System 20230607 and earlier allows remote attackers to create arbitrary user accounts. The user-creation handler accepts unauthenticated POST values for user, level, and newpassword and creates the supplied account without a session cookie. Network access to the web interface is sufficient, and the new account provides persistent access at the attacker-selected level.

The record

CVE
CVE-2023-3305
Published
Jun 18, 2023
Updated
Aug 2, 2024
Vendor
Shenzhen C-Data Technology Co., Ltd.
Product
C-DATA Web Management System
Classifications
CWE-284, T1136.001
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 18, 2023CVE publishedPublication date reported by the CVE source.
  2. Aug 2, 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?

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  1. Affected versionversion=20230607

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Shenzhen C-Data Technology Co., Ltd. · C-DATA Web Management Systemversion=20230607

Published CVSS scores

7.5VulDBAV:N/AC:L/Au:N/C:P/I:P/A:P
7.3VulDBCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
7.5NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/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.

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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 exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control
T1136.001Local Account

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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