Information disclosure in Parse Server

1) Information disclosure

EUVDB-ID: #VU56933

Risk: Low

CVSSv3.1: 3.7 [CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: N/A

CWE-ID: CWE-200 - Information exposure

Exploit availability: No

Description

The vulnerability allows a remote attacker to gain access to potentially sensitive information.

The vulnerability exists due to LiveQuery includes users' session token into payloads. If a user has a LiveQuery subscription on the Parse.User class, all session tokens created during user sign-ups will be broadcast as part of the LiveQuery payload. A remote attacker can obtain the session token from the broadcasted payload and reuse it to bypass authentication.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

Parse Server: 2.0.0 - 4.10.3

External links

http://github.com/parse-community/parse-server/releases/tag/4.10.4
http://github.com/parse-community/parse-server/security/advisories/GHSA-7pr3-p5fm-8r9x

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.