CVE-2026-110617 in we-mp-rss
Summary
by MITRE • 10/15/2026
we-mp-rss through 1.5.3 contains a missing authorization vulnerability in the /api/v1/wx/tools/export/download endpoint that allows unauthenticated attackers to download export archives because its authentication dependency is commented out. Attackers can supply an mp_id and guessable timestamp-based export filename to retrieve archives under data/docs, and set delete_after_download=true to delete them.
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Analysis
by VulDB Data Team • 10/15/2026
The vulnerability identified in we-mp-rss versions up to 1.5.3 represents a critical failure in access control mechanisms within the application's API layer. Specifically, the endpoint /api/v1/wx/tools/export/download suffers from missing authorization checks due to commented-out authentication dependencies in the source code. This configuration error effectively exposes sensitive data retrieval functionality to unauthenticated actors on the network. The flaw is not merely a logic error but a fundamental breakdown of security controls that should restrict access based on user identity and permissions, allowing any entity with network connectivity to interact with this endpoint without providing valid credentials or session tokens.
From a technical perspective, the exploitation vector relies on two key factors: the absence of authentication middleware for the specific download route and the predictability of file naming conventions used by the application. The export feature generates archives containing data from WeChat Official Platform accounts under the directory structure data/docs. These files are named using timestamps that can be easily guessed or enumerated by an attacker who understands the generation logic. By supplying a valid mp_id parameter alongside a predicted timestamp-based filename, an unauthenticated user can construct requests to retrieve these export archives. This mechanism bypasses standard security boundaries because the server does not verify if the requesting entity owns the associated account or has permission to access the specific data being requested.
The operational impact of this vulnerability is severe, primarily involving unauthorized disclosure of sensitive information and potential integrity compromise through deletion capabilities. The exported archives likely contain proprietary content, user communications, analytics data, or other confidential materials belonging to WeChat Official Platform administrators who utilize we-mp-rss for management purposes. Furthermore, the endpoint includes a delete_after_download parameter that can be set to true by attackers. This feature allows malicious actors not only to exfiltrate sensitive data but also to permanently destroy it, leading to denial of service conditions and loss of critical business records. The combination of unauthorized access and destructive capability amplifies the risk profile significantly beyond simple information leakage.
This vulnerability aligns with CWE-287, which describes Improper Authentication, as well as CWE-359 regarding Exposure of Private Information Without Proper Access Control. In terms of adversarial tactics, this behavior corresponds to ATT&CK technique T1005, Data from Local System Retrieval, where attackers extract data directly from local storage without detection due to the lack of access controls. The ability to delete files also touches upon aspects of T1485, Data Destruction, although primarily in the context of availability impact rather than pure ransomware-style encryption.
Mitigation strategies must address both immediate remediation and long-term architectural improvements. Immediately, administrators should upgrade we-mp-rss to a version greater than 1.5.3 where this authentication dependency has been restored or properly implemented. If upgrading is not immediately feasible, the affected endpoint should be disabled via web server configuration rules such as Nginx deny directives or Apache mod_rewrite blocks until a patch can be applied. Additionally, implementing strict access controls at the API gateway level and ensuring that all endpoints require valid session tokens before processing requests will prevent similar issues in other parts of the application. Regular code reviews focusing on authentication middleware integration are essential to ensure that security dependencies remain active during development cycles.