CVE-2026-109187 in jshERP
Summary
by MITRE • 10/12/2026
jshERP through 3.6 contains an information disclosure vulnerability that allows any authenticated user to read platform-wide configuration secrets via the getInfoByKey handler of PlatformConfigController. Low-privilege users of any tenant can request arbitrary platformKey values such as email_auth_code or activation_code to obtain SMTP authorization codes and activation secrets, because only aliOss and weixin keys are blocked.
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Analysis
by VulDB Data Team • 10/12/2026
The vulnerability identified in jshERP versions up to 3.6 represents a critical information disclosure flaw rooted in improper access control mechanisms within the platform configuration management module. Specifically, the issue resides in the getInfoByKey handler of the PlatformConfigController class, which is designed to retrieve specific configuration parameters from the system's central repository. While the application implements authentication and basic role-based restrictions for many administrative functions, it fails to enforce adequate authorization checks when handling requests for sensitive global configuration keys. This architectural oversight allows any authenticated user, regardless of their privilege level or tenant affiliation, to query arbitrary platform-wide secrets by supplying specific key names in their API requests.
The technical root cause is a lack of strict allow-listing or comprehensive deny-listing logic within the backend controller responsible for serving configuration data. The developers implemented a partial mitigation strategy that blocks access only to keys explicitly named aliOss and weixin, likely due to concerns over cloud storage credentials and social media integration secrets respectively. However, this approach is fundamentally flawed because it relies on an incomplete blacklist rather than validating whether the requesting user has the necessary permissions to view the specific configuration item being requested. Consequently, any key not present in that limited blocklist remains accessible to all authenticated users. This design pattern creates a significant attack surface where attackers can enumerate and extract sensitive data by iterating through common configuration keys or targeting known high-value targets such as email service credentials.
The operational impact of this vulnerability is severe due to the nature of the exposed secrets, which include SMTP authorization codes and activation codes for third-party services like Alibaba Cloud OSS and WeChat integration. The exposure of SMTP authorization codes allows an attacker to impersonate the organization in email communications. This capability facilitates sophisticated phishing campaigns, business email compromise attacks, or the distribution of malware under the guise of legitimate organizational correspondence. Furthermore, access to activation secrets can enable unauthorized account activations for services tied to these keys, potentially leading to further system compromises or financial loss if those accounts are linked to billing information. Since low-privilege users within any tenant can exploit this flaw, an attacker who gains initial foothold through a standard user account can escalate their impact by harvesting credentials that affect the entire platform infrastructure rather than just their isolated tenant environment.
From a classification perspective, this vulnerability aligns with CWE-200: Information Exposure and CWE-862: Missing Authorization, as it involves the unauthorized access to sensitive information due to insufficient permission checks. In terms of adversary tactics, this behavior corresponds to ATT&CK technique T1530: Data from Cloud Storage Object or T1078: Valid Accounts combined with data exfiltration methods that leverage legitimate application functionality for malicious purposes. The exploitation does not require complex injection techniques but rather simple HTTP requests crafted by an authenticated user, making it highly exploitable and difficult to detect through traditional signature-based intrusion detection systems without specific behavioral monitoring of configuration access patterns.
To mitigate this vulnerability, immediate remediation should focus on implementing strict role-based access control for the PlatformConfigController endpoints. Access to sensitive configuration keys must be restricted exclusively to users with administrative privileges who have a verified business need to view such data. The current blacklist approach is insufficient; instead, an allow-list mechanism or explicit permission checks against user roles and tenant boundaries should be enforced at the controller level. Additionally, developers should audit other API endpoints for similar authorization gaps where sensitive configuration data might be exposed through generic retrieval handlers. For organizations unable to patch immediately, network-level controls such as Web Application Firewalls can be configured to monitor and alert on unusual patterns of requests targeting configuration keys by low-privilege users, although this is a compensatory measure rather than a fix for the underlying code defect.