CVE-2026-19355: MingSoft MCMS SQL Injection Vulnerability

CVE-2026-19355 Overview

CVE-2026-19355 is a SQL injection vulnerability in MingSoft MCMS through version 3.0.6. The flaw resides in the ModelDataImpl.queryDiyFormData function reachable via the /mdiy/form/data/list.do endpoint within the ms-mdiy component. Attackers can manipulate the formFields argument to inject arbitrary SQL statements. The vulnerability is exploitable remotely and does not require authentication or user interaction. A public exploit has been disclosed, increasing the likelihood of opportunistic attacks. The vendor was contacted about this disclosure but did not respond, and no official patch has been referenced in public advisories at the time of publication.

Critical Impact
Unauthenticated remote attackers can inject SQL through the formFields parameter to read, modify, or exfiltrate data from the backing database.

Affected Products

MingSoft MCMS versions up to and including 3.0.6
Component: ms-mdiy
Endpoint: /mdiy/form/data/list.do

Discovery Timeline

2026-08-09 - CVE-2026-19355 published to NVD
2026-08-12 - Last updated in NVD database

Technical Details for CVE-2026-19355

Vulnerability Analysis

The vulnerability is classified under [CWE-74] (Improper Neutralization of Special Elements in Output Used by a Downstream Component). The ModelDataImpl.queryDiyFormData function processes the formFields HTTP parameter and incorporates its value into a SQL query without sufficient sanitization or parameterization. An attacker submitting crafted input to /mdiy/form/data/list.do can alter the structure of the resulting SQL statement. Because the endpoint is reachable over the network and does not require authentication, exploitation only requires the ability to send an HTTP request to the affected host.

Root Cause

The root cause is unsafe construction of SQL queries within the ms-mdiy dynamic form component. User-supplied values in the formFields argument are concatenated into a query string rather than bound as parameters. This missing input neutralization allows adversary-controlled fragments to be interpreted as SQL syntax by the database engine.

Attack Vector

Exploitation is performed remotely over HTTP against the /mdiy/form/data/list.do handler. The attacker submits a request containing a malicious formFields value. Public disclosure of the exploit lowers the barrier to entry, allowing scripted mass scanning against exposed MCMS instances. Successful injection can enable data extraction from arbitrary tables, authentication data enumeration, and, depending on database privileges, write operations against CMS records.

No verified proof-of-concept code is republished here. See the VulDB entry for CVE-2026-19355 for further technical detail.

Detection Methods for CVE-2026-19355

Indicators of Compromise

HTTP requests to /mdiy/form/data/list.do containing SQL metacharacters such as single quotes, UNION, SELECT, SLEEP(, or comment sequences (--, /*) in the formFields parameter.
Unexpected database errors or long response times originating from the ms-mdiy component in application logs.
Outbound connections from the MCMS application server to unfamiliar hosts following requests to the vulnerable endpoint.

Detection Strategies

Deploy a web application firewall rule that inspects the formFields argument for SQL injection payloads on the /mdiy/form/data/list.do path.
Enable database query logging and alert on queries containing suspicious tautologies (for example, OR 1=1) tied to the MCMS application user.
Correlate HTTP 500 responses from the ms-mdiy component with the source IP to identify probing activity.

Monitoring Recommendations

Baseline normal request volume and parameter patterns for /mdiy/form/data/list.do and alert on deviations.
Forward MCMS application, web server, and database logs to a centralized platform for correlation and long-term retention.
Monitor for exfiltration behavior such as large outbound response sizes from the CMS host following requests to the vulnerable endpoint.

How to Mitigate CVE-2026-19355

Immediate Actions Required

Restrict network access to /mdiy/form/data/list.do to trusted management networks until a fix is available.
Deploy WAF signatures that block SQL injection payloads targeting the formFields parameter.
Audit MCMS database accounts and revoke privileges beyond those strictly required by the application.
Review web and database logs from before the publication date for evidence of prior exploitation.

Patch Information

At the time of publication, MingSoft has not released a public patch advisory referenced in NVD. According to the disclosure, the vendor was contacted but did not respond. Monitor the MingSoft MCMS project and vendor channels for updated releases beyond version 3.0.6. When a patched build is released, upgrade all instances and rotate any database credentials that were used by the affected application.

Workarounds

Place the MCMS administrative and dynamic-form endpoints behind an authenticated reverse proxy or VPN.
Use a WAF or reverse proxy rule to reject requests to /mdiy/form/data/list.do where formFields contains SQL syntax tokens.
Configure the database account used by MCMS as a least-privilege user with no rights to sensitive schemas or FILE privileges.
Disable the ms-mdiy dynamic form component if it is not required by the deployment.

bash

# Example nginx rule to block obvious SQLi payloads targeting the vulnerable endpoint
location = /mdiy/form/data/list.do {
    if ($arg_formFields ~* "(union|select|sleep\(|--|/\*|or 1=1)") {
        return 403;
    }
    proxy_pass http://mcms_backend;
}