Parse Server's MFA Recovery Codes Can be Used Multiple Times

Summary

If you use multi-factor authentication (MFA) with Parse Server, an attacker could use a single recovery code to log in multiple times without the code being used only once. To fix this, update to Parse Server version 9.6.0-alpha.7 or 8.6.33.

What to do

Update parse-server to version 9.6.0-alpha.7.
Update parse-server to version 8.6.33.

Affected software

Vendor	Product	Affected versions	Fix available
–	parse-server	> 9.0.0-alpha.1 , <= 9.6.0-alpha.7	9.6.0-alpha.7
–	parse-server	<= 8.6.33	8.6.33
parseplatform	parse-server	<= 8.6.33	–
parseplatform	parse-server	> 9.0.0 , <= 9.6.0	–
parseplatform	parse-server	9.6.0	–
parseplatform	parse-server	9.6.0	–
parseplatform	parse-server	9.6.0	–
parseplatform	parse-server	9.6.0	–
parseplatform	parse-server	9.6.0	–
parseplatform	parse-server	9.6.0	–

Original title

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.7 and 8.6.33, when multi-factor authentication (MFA) via TOTP is enabled...

Original description

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to 9.6.0-alpha.7 and 8.6.33, when multi-factor authentication (MFA) via TOTP is enabled for a user account, Parse Server generates two single-use recovery codes. These codes are intended as a fallback when the user cannot provide a TOTP token. However, recovery codes are not consumed after use, allowing the same recovery code to be used an unlimited number of times. This defeats the single-use design of recovery codes and weakens the security of MFA-protected accounts. An attacker who obtains a single recovery code can repeatedly authenticate as the affected user without the code ever being invalidated. This vulnerability is fixed in 9.6.0-alpha.7 and 8.6.33.

ghsa CVSS4.0 8.2

Vulnerability type

CWE-672