Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior o 9.5.2-alpha.10 and 8.6.23, Parse Servers rate limiting middleware is applied at the Express middleware layer, but the batch request endpoint (/batch) processes sub-requests internally by routing them directly through the Promise router, bypassing Express middleware including rate limiting. An attacker can bundle multiple requests targeting a rate-limited endpoint into a single batch request to circumvent the configured rate limit. Any Parse Server deployment that relies on the built-in rate limiting feature is affected. This vulnerability is fixed in 9.5.2-alpha.10 and 8.6.23.
Weakness
The product does not properly limit the number or frequency of interactions that it has with an actor, such as the number of incoming requests.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Parse-server | Parseplatform | * | 8.6.23 (excluding) |
| Parse-server | Parseplatform | 9.0.0 (including) | 9.5.2 (excluding) |
| Parse-server | Parseplatform | 9.5.2-alpha1 (including) | 9.5.2-alpha1 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha2 (including) | 9.5.2-alpha2 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha3 (including) | 9.5.2-alpha3 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha4 (including) | 9.5.2-alpha4 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha5 (including) | 9.5.2-alpha5 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha6 (including) | 9.5.2-alpha6 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha7 (including) | 9.5.2-alpha7 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha8 (including) | 9.5.2-alpha8 (including) |
| Parse-server | Parseplatform | 9.5.2-alpha9 (including) | 9.5.2-alpha9 (including) |