Summary
Wukong_HRM contains an authentication bypass in ParamAspect that may allow unauthenticated requests to reach HRM API endpoints when the AUTH-TOKEN header is omitted. Successful exploitation could grant HR administrator-level access to sensitive employee information and enable modification or deletion of company-wide HR records.
Wukong_HRM contains an authentication bypass in ParamAspect that may allow unauthenticated requests to reach HRM API endpoints when the AUTH-TOKEN header is omitted. Successful exploitation could grant HR administrator-level access to sensitive employee information and enable modification or deletion of company-wide HR records.
Affected context
The vulnerability occurs in Wukong_HRM deployments using the affected ParamAspect authentication behavior, including code at or before the referenced commit. Risk is present where HRM API endpoints rely on the AUTH-TOKEN header for access control but do not consistently reject requests when that header is absent. Exposed or reachable API routes may provide access to payroll, employee, attachment, and administrative record functions.
The vulnerability occurs in Wukong_HRM deployments using the affected ParamAspect authentication behavior, including code at or before the referenced commit. Risk is present where HRM API endpoints rely on the AUTH-TOKEN header for access control but do not consistently reject requests when that header is absent. Exposed or reachable API routes may provide access to payroll, employee, attachment, and administrative record functions.
Exploit preconditions
- Attack surface: Wukong_HRM HTTP API endpoints protected by ParamAspect
- Required access: Network reachability to the HRM service; valid credentials may not be required
- Trigger point: An API request that omits the expected AUTH-TOKEN header
- Why exploitation is possible: Authentication enforcement may treat a missing token as acceptable rather than terminating the request before authorization checks
- Attack surface: Wukong_HRM HTTP API endpoints protected by ParamAspect
- Required access: Network reachability to the HRM service; valid credentials may not be required
- Trigger point: An API request that omits the expected AUTH-TOKEN header
- Why exploitation is possible: Authentication enforcement may treat a missing token as acceptable rather than terminating the request before authorization checks
Why this happens
The underlying flaw is an authentication enforcement failure. ParamAspect does not reliably require and validate the AUTH-TOKEN header before allowing requests to proceed to HRM API handlers. This maps to CWE-287: Improper Authentication, where the application fails to adequately establish the identity of a caller before granting access to protected functionality.
The underlying flaw is an authentication enforcement failure. ParamAspect does not reliably require and validate the AUTH-TOKEN header before allowing requests to proceed to HRM API handlers. This maps to CWE-287: Improper Authentication, where the application fails to adequately establish the identity of a caller before granting access to protected functionality.
Potential impact
- Unauthenticated users may access HR administrator functionality
- Attackers could read payslips, salary history, and employee personal data
- Sensitive HR attachments could be downloaded
- Company-wide HR records may be modified or deleted
- The incident could result in privacy violations, fraud, operational disruption, or regulatory exposure
- Unauthenticated users may access HR administrator functionality
- Attackers could read payslips, salary history, and employee personal data
- Sensitive HR attachments could be downloaded
- Company-wide HR records may be modified or deleted
- The incident could result in privacy violations, fraud, operational disruption, or regulatory exposure
General mitigation guidance
Mitigation generally focuses on making authentication mandatory and enforcing it consistently at a centralized boundary before any HRM handler executes.
Common defensive patterns include:
- Rejecting requests when the authentication header is missing, malformed, expired, or invalid
- Applying deny-by-default authentication and authorization middleware to every protected endpoint
- Separating authentication from role and permission checks, with explicit verification of HR administrator privileges
- Reducing trust in client-supplied identity or role attributes
- Limiting service accounts and administrative permissions according to least privilege
- Protecting sensitive endpoints with additional controls such as session security, network restrictions, and audit logging
- Avoiding exposure of HR APIs directly to untrusted networks where feasible
Mitigation generally focuses on making authentication mandatory and enforcing it consistently at a centralized boundary before any HRM handler executes.
Common defensive patterns include:
- Rejecting requests when the authentication header is missing, malformed, expired, or invalid
- Applying deny-by-default authentication and authorization middleware to every protected endpoint
- Separating authentication from role and permission checks, with explicit verification of HR administrator privileges
- Reducing trust in client-supplied identity or role attributes
- Limiting service accounts and administrative permissions according to least privilege
- Protecting sensitive endpoints with additional controls such as session security, network restrictions, and audit logging
- Avoiding exposure of HR APIs directly to untrusted networks where feasible
How teams detect issues like this
Detection can combine code review, automated testing, and runtime monitoring:
- Use static analysis to identify authentication branches that accept missing headers or default to an authenticated state
- Review ParamAspect and equivalent middleware for fail-open behavior and inconsistent endpoint coverage
- Add negative authorization tests confirming that requests without tokens cannot access every protected API category
- Monitor access logs for unauthenticated requests receiving successful responses from administrative routes
- Alert on unusual bulk reads, attachment downloads, record deletions, or modifications by anonymous or unexpected principals
- Enforce API security policies requiring authentication and authorization checks for all sensitive routes
Detection can combine code review, automated testing, and runtime monitoring:
- Use static analysis to identify authentication branches that accept missing headers or default to an authenticated state
- Review ParamAspect and equivalent middleware for fail-open behavior and inconsistent endpoint coverage
- Add negative authorization tests confirming that requests without tokens cannot access every protected API category
- Monitor access logs for unauthenticated requests receiving successful responses from administrative routes
- Alert on unusual bulk reads, attachment downloads, record deletions, or modifications by anonymous or unexpected principals
- Enforce API security policies requiring authentication and authorization checks for all sensitive routes
