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Security Advisories: GSA_kwCzR0hTQS03dzU0LWdwOHgtZjMzbc0hUQ

Potential exposure of tokens to an Unauthorized Actor


When using this library as a way to programmatically communicate with Replit in a standalone fashion, if there are multiple failed attempts to contact Replit through a WebSocket, the library will attempt to communicate using a fallback poll-based proxy. The URL of the proxy has changed, so any communication done to the previous URL could potentially reach a server that is outside of Replit's control and the token used to connect to the Repl could be obtained by an attacker, leading to full compromise of that Repl (not of the account).


This was patched in 7.3.1, by updating the address of the fallback WebSocket polling proxy to the new one.


Specify the new address for the polling host ( in the ConnectArgs:

const connectOptions: ConnectArgs = {
  // ...
  pollingHost: '',

For more information

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Source: GitHub Advisory Database
Origin: Unspecified
Severity: Moderate
Classification: General
Published: over 1 year ago
Updated: about 2 months ago

CVSS Score: 6.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Identifiers: GHSA-7w54-gp8x-f33m, CVE-2022-21671

Affected Packages

Versions: < 7.3.1
Fixed in: 7.3.1