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GHSA-75v4-m273-5j49
No affected components available
Impact
Apps that enable MFA and deny get on the _User class via Class-Level Permissions could expose sensitive user data through the /login and /verifyPassword endpoints.
These endpoints re-fetch the user through the access-controlled query pipeline (CLP, protectedFields, auth-adapter sanitizers) before responding. When that re-fetch was denied by the _User get permission, the server fell back to the raw database row, exposing raw authData (including MFA TOTP secrets and recovery codes) and fields hidden by protectedFields (when protectedFieldsOwnerExempt is false).
/verifyPassword is the most severe: with only a username and password (no session or MFA token), an attacker who knows a victim's password could retrieve their MFA secret and recovery codes, defeating the second factor.
Only Parse Server 9.8.0 and later are affected; 8.x and earlier are not. Master and maintenance key requests are unaffected, as they bypass these controls by design.
Patches
On a denied re-fetch, /login and /verifyPassword no longer fall back to the raw row; they return only the user's identity (plus the session token for /login). Master and maintenance key callers still receive the full record.
Workarounds
None that preserve the intended _User get restriction. Upgrade to a patched version.
The vulnerability can be exploited over the network without needing physical access. It is easy for an attacker to exploit this vulnerability. An attacker needs high-level or administrative privileges. No user interaction is needed for the attacker to exploit this vulnerability.
Limited exploitation activity has been observed. Close monitoring and planned remediation are recommended.
The exploit probability is very low. The vulnerability is unlikely to be exploited in the next 30 days.
We did not find any exploit available. Neither in GitHub repositories nor in the Exploit-Database.
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