CSRF in XXL-JOB User Management Controller

Executive Summary

This vulnerability is a Cross-Site Request Forgery (CSRF) in XXL-JOB 3.5.0-SNAPSHOT and earlier. The user management controller (JobUserController) has endpoints /user/insert, /user/update, and /user/delete that lack CSRF protection and do not restrict HTTP methods.

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Detection Guidance

To detect this CSRF vulnerability in XXL-JOB 3.5.0-SNAPSHOT or earlier, inspect the user management endpoints (/user/insert, /user/update, /user/delete) for missing CSRF tokens or improper HTTP method restrictions. Check server logs for unauthorized POST requests to these endpoints without referrer checks or origin validation.

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Impact Analysis

An attacker could trick a user into clicking a malicious link, leading to unauthorized changes in user management such as creating, updating, or deleting users without their consent.

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Compliance Impact

This vulnerability could lead to unauthorized access or modifications to user data, potentially violating GDPR (data integrity and access controls) and HIPAA (unauthorized changes to sensitive health information).

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Mitigation Strategies

Immediately upgrade to a patched version of XXL-JOB beyond 3.5.0-SNAPSHOT. If upgrading is not possible, implement CSRF tokens on the vulnerable endpoints and restrict HTTP methods to POST only. Add referrer or origin header checks to prevent unauthorized requests.

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