CVE-2026-89265 in MoguBlog
Summary
by MITRE • 09/11/2026
MoguBlog through 6.2 contains an authorization bypass vulnerability in the POST /pictureSort/getPictureSortByUid endpoint, which omits the @AuthorityVerify annotation required to enforce role-based permissions. Authenticated back-office users without image-category permissions can supply a category uid to retrieve restricted image-category records including metadata such as name, cover file uid, sort order and timestamps.
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Analysis
by VulDB Data Team • 09/11/2026
The vulnerability identified in MoguBlog versions through 6.2 represents a critical failure in access control mechanisms within the application's backend API layer. Specifically, this flaw resides in the POST /pictureSort/getPictureSortByUid endpoint, which is designed to retrieve image category details based on a provided unique identifier. The root cause of this insecurity stems from an omission in the server-side code where the @AuthorityVerify annotation was not applied to this specific method. In many Java-based web frameworks utilizing Spring Security or similar authentication modules, such annotations serve as declarative markers that trigger middleware logic to validate user roles and permissions before executing the underlying business logic. Without this enforcement mechanism, the endpoint operates without verifying whether the authenticated session possesses the requisite privileges for image category management, effectively bypassing the intended role-based access control model.
This technical deficiency allows any authenticated back-office user who lacks specific image-category permissions to exploit the endpoint by supplying a valid category uid in their request payload. The application processes this input and returns sensitive metadata associated with restricted image categories. This data includes descriptive information such as the category name, the unique identifier for its cover file, sort order parameters, and creation or modification timestamps. While these fields may appear benign individually, their aggregation provides an attacker with a structured map of the content organization within the blog platform. In security taxonomy terms, this is classified under CWE-285 Improper Authorization, as the application fails to enforce proper access controls on resources accessible by authenticated users but not authorized for them.
The operational impact of this vulnerability extends beyond simple data leakage. By enumerating restricted image categories and their associated metadata, an attacker can gain valuable intelligence about the structure and content strategy of the target website. This information facilitates further reconnaissance efforts, potentially aiding in more targeted attacks such as identifying high-value assets or understanding how administrators organize sensitive media files. Furthermore, if this endpoint is coupled with other vulnerabilities like insecure direct object references or file upload flaws, the exposed metadata could serve as a stepping stone for privilege escalation or unauthorized content manipulation. The ATT&CK framework categorizes this behavior under T1087 Account Discovery and potentially T1530 Data from Cloud Storage Objects, depending on how the cover file uid is utilized to access actual media assets stored in backend object storage systems.
To mitigate this vulnerability, immediate remediation involves applying the missing @AuthorityVerify annotation or its equivalent security guard clause to the getPictureSortByUid method within the source code. This ensures that every request to this endpoint undergoes a rigorous check against the user's assigned roles and permissions before returning any data. Additionally, developers should implement principle of least privilege by ensuring that API endpoints are explicitly secured with role-based checks rather than relying on implicit defaults. It is also advisable to conduct a comprehensive audit of other backend endpoints for similar omissions in security annotations or access control logic. For organizations unable to patch immediately due to deployment constraints, implementing a Web Application Firewall rule to restrict access to this specific endpoint based on user roles can provide an effective compensating control until the code-level fix is deployed.