Authorization Bypass due to Incorrect Access Control in danny-avila/librechat

Vulnerability Description

danny-avila/librechat is affected by an authorization bypass vulnerability due to improper access control checks. The `checkAccess` function in `api/server/middleware/roles/access.js` uses `permissions.some()` to validate permissions, which incorrectly grants access if only one of multiple required permissions is present. This allows users with the 'USER' role to create agents despite having `CREATE: false` permission, as the check for `['USE', 'CREATE']` passes with just `USE: true`. This vulnerability affects other permission checks as well, such as `PROMPTS`. The issue is present in all versions prior to the fix.

References

• https://huntr.com/bounties/7de2765b-d1fe-4495-9144-220070857c48
• https://github.com/danny-avila/librechat/commit/91a2df47599c09d80886bfc28e0ccf1debd42110