parse-server is a version of the Parse backend that can be deployed to any infrastructure that can run Node.js.
Affected versions of this package are vulnerable to Use of a Broken or Risky Cryptographic Algorithm via the Google authentication. An attacker can gain unauthorized access to any user account linked with Google authentication by forging a JWT token with alg set to "none". This is only exploitable if Google authentication is enabled.
Workaround
This vulnerability can be mitigated by disabling Google authentication until upgrading is possible.
Remediation
Upgrade parse-server to version 8.6.3, 9.3.1-alpha.4 or higher.