CVE-2026-88414 in MCMS
Summary
by MITRE • 09/22/2026
MCMS 6.1.1 through 6.2.1 contains a SQL injection vulnerability in the PageAction.verify endpoint (GET /ms/mdiy/page/verify.do).
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Analysis
by VulDB Data Team • 09/22/2026
The Microsoft Content Management System, specifically versions ranging from 6.1.1 to 6.2.1, is susceptible to a critical SQL injection vulnerability located within the PageAction.verify endpoint. This security flaw manifests when processing requests directed at the GET /ms/mdiy/page/verify.do path. The underlying technical issue stems from insufficient input validation and sanitization mechanisms applied to user-supplied data before it is incorporated into database queries executed by the backend application logic. When an attacker crafts a malicious HTTP request containing specially constructed SQL commands within the parameters of this endpoint, the vulnerable server processes these inputs as part of the query structure rather than treating them strictly as data values. This failure in separation between code and data allows the injected SQL statements to alter the intended logic of the database operations, effectively bypassing authentication controls or extracting sensitive information directly from the backend database management system.
The operational impact of this vulnerability is severe due to its potential for remote exploitation without requiring prior authentication in certain configurations, although it may also be leveraged by authenticated users with lower privileges to escalate their access rights. By exploiting this SQL injection flaw, an attacker can perform unauthorized data retrieval, modify existing records, or even execute administrative commands on the underlying database server depending on the permissions granted to the application's database account. This capability compromises the confidentiality, integrity, and availability of the content managed by MCMS. Sensitive corporate information, user credentials stored in plaintext or weakly hashed formats, and proprietary business logic contained within the CMS databases are at risk of exposure. Furthermore, if the database service runs with elevated privileges on the host operating system, successful exploitation could lead to full server compromise, allowing the attacker to install backdoors, deploy ransomware, or pivot into other internal network segments.
From a classification perspective, this vulnerability aligns with Common Weakness Enumeration identifier CWE-89, which describes Improper Neutralization of Special Elements used in an SQL Command. This categorization highlights the fundamental failure in input handling that permits malicious syntax to be interpreted as executable code by the database engine. In terms of offensive security frameworks, such exploitation techniques are documented within MITRE ATT&CK framework under tactics related to Initial Access and Credential Access, specifically mapping to techniques involving injection attacks for gaining unauthorized entry or stealing authentication credentials. The specific endpoint involved suggests that attackers might target this vector during reconnaissance phases to identify vulnerable instances or as a direct method of initial compromise in environments where MCMS is exposed to untrusted networks without adequate web application firewall protections.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. The primary corrective action involves upgrading the Microsoft Content Management System software to a version that includes patches for this specific SQL injection flaw, as vendor-supplied updates typically contain code fixes that enforce proper parameterization of database queries. In scenarios where patching is not immediately feasible due to operational constraints or compatibility issues with legacy systems, network-level controls should be implemented. Deploying Web Application Firewalls configured with rulesets capable of detecting and blocking common SQL injection patterns can provide a layer of defense against exploitation attempts. Additionally, developers must ensure that all future customizations or integrations involving the PageAction.verify endpoint utilize prepared statements or stored procedures to strictly separate data from executable code. Regular security audits focusing on input validation practices across all API endpoints are essential to prevent similar vulnerabilities from being introduced in subsequent development cycles.