CVE-2026-109174 in MoguBlog
Summary
by MITRE • 10/12/2026
MoguBlog through 6.2 contains an information disclosure vulnerability that allows low-privileged front-end users to read system credentials via the getSystemConfig endpoint. Attackers can supply an ordinary reader session token to retrieve unfiltered SystemConfig data, exposing Qiniu and MinIO secret keys and SMTP mailbox passwords.
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Analysis
by VulDB Data Team • 10/12/2026
The security flaw identified in MoguBlog versions up through 6.2 represents a critical failure in access control mechanisms within the application's backend API architecture. Specifically, the vulnerability resides in the getSystemConfig endpoint, which is designed to retrieve system configuration parameters necessary for the proper functioning of the blog platform. Under normal operational circumstances, this endpoint should enforce strict authentication and authorization checks to ensure that only administrators or privileged service accounts can access sensitive configuration data. However, due to insufficient validation logic, the application fails to distinguish between high-privilege administrative requests and low-privileged front-end user sessions when processing calls to this specific API method. This oversight allows any authenticated user with even minimal privileges, such as a standard reader account, to invoke the endpoint and receive a response containing unfiltered system configuration data.
The technical nature of this vulnerability aligns closely with CWE-284 Improper Access Control and CWE-200 Information Exposure. The core issue is not necessarily a flaw in encryption or input sanitization but rather a logical error where the server does not verify that the requesting entity possesses the requisite permissions to view system-level settings. By supplying an ordinary reader session token, an attacker can bypass these implicit security boundaries. This type of vulnerability often stems from developers assuming that certain endpoints are only accessible via administrative interfaces without implementing explicit role-based access control checks on every API route. The lack of granular permission verification at the endpoint level creates a direct path for unauthorized data retrieval, undermining the confidentiality guarantees expected in multi-user web applications.
The operational impact of this vulnerability is severe due to the sensitivity of the exposed information. The unfiltered SystemConfig response includes critical credentials required for third-party integrations and infrastructure services. Specifically, attackers can extract Qiniu and MinIO secret keys as well as SMTP mailbox passwords. These credentials are essential for cloud storage operations and email notification systems respectively. Compromise of Qiniu or MinIO keys allows an attacker to potentially read, write, or delete files stored in the associated object storage buckets, leading to data loss, defacement, or further exploitation through malicious file uploads. Similarly, access to SMTP passwords enables attackers to send spoofed emails from the application's domain, facilitating phishing campaigns against users and damaging the reputation of the blog platform. This exposure effectively grants an attacker significant leverage over both the data integrity and communication channels of the affected system.
From a threat modeling perspective using the MITRE ATT&CK framework, this vulnerability facilitates initial access to sensitive configuration data which can be categorized under T1504 Web Service Discovery or more specifically as part of credential harvesting activities that support later stages like T1078 Valid Accounts if those credentials are reused elsewhere. The ability to retrieve these secrets lowers the barrier for subsequent attacks such as lateral movement within cloud environments or social engineering campaigns targeting end-users. To mitigate this risk, immediate remediation is required by implementing strict role-based access control on all administrative API endpoints. Developers must ensure that the getSystemConfig endpoint explicitly checks for administrator-level privileges before returning any data. Additionally, it is recommended to implement a principle of least privilege where configuration retrieval is separated from general system status queries, ensuring that sensitive keys are never returned in responses intended for non-privileged users. Regular security audits and static code analysis focused on access control logic can help prevent similar oversights in future development cycles.