CVE-2026-4234Public exploitNetwork attack vector

Authenticated SQL injection via unsafe DDL identifiers

Published Mar 16, 2026 · Updated Mar 16, 2026

SQL injection in the DDL Handler of SiteServer CMS 7.4.0 allows remote authenticated users to alter SQL execution via tableHandWrite. SitesAddController.Submit.cs passes the field into dynamic CREATE TABLE and CREATE INDEX statements without a strict identifier allowlist. A low-privileged account can submit crafted identifier syntax to perform time-based blind injection and unintended schema operations.

CVSS severity6.3
Medium
EPSS probability0.19%
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 the DDL Handler of SiteServer CMS 7.4.0 allows remote authenticated users to alter SQL execution via tableHandWrite. SitesAddController.Submit.cs passes the field into dynamic CREATE TABLE and CREATE INDEX statements without a strict identifier allowlist. A low-privileged account can submit crafted identifier syntax to perform time-based blind injection and unintended schema operations.

The record

CVE
CVE-2026-4234
Published
Mar 16, 2026
Updated
Mar 16, 2026
Vendor
SiteServer
Product
SiteServer CMS
Classifications
CWE-74, CWE-89, T1190
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 16, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 16, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

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

  1. Affected versionversion=7.4.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

SiteServer · SiteServer CMSversion=7.4.0

Published CVSS scores

6.5VulDB CNAAV:N/AC:L/Au:S/C:P/I:P/A:P
6.3VulDB CNACVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
2.1VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
5.3VulDB CNACVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/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.

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
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-74Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
T1190Exploit Public-Facing Application

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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