CVE-2023-22474

Description

### Impact Parse Server uses the request header `x-forwarded-for` to determine the client IP address. If Parse Server doesn't run behind a proxy server, then a client can set this header and Parse Server will trust the value of the header. The incorrect client IP address will be used by various features in Parse Server. This allows to circumvent the security mechanism of the Parse Server option `masterKeyIps` by setting an allowed IP address as the `x-forwarded-for` header value. ### Patches The mechanism to determine the client IP address has been rewritten. The correct IP address determination now requires to set the Parse Server option `trustProxy` accordingly, see the express framework's [trust proxy](https://expressjs.com/en/guide/behind-proxies.html) setting. ### References - https://github.com/parse-community/parse-server/security/advisories/GHSA-vm5r-c87r-pf6x - https://expressjs.com/en/guide/behind-proxies.html

How to fix CVE-2023-22474

To remediate CVE-2023-22474, upgrade the affected package to a fixed version below.

• —upgrade to 5.4.1 or later
• —upgrade to 5.4.1 or later

Is CVE-2023-22474 being exploited?

Low — EPSS is 0.3%, meaning exploitation activity has not been observed at scale.

Affected packages (2)

• from 0, < 5.4.1
• from 0, < 5.4.1

CVSS scores

References (5)

• ADVISORYnvd.nist.gov/vuln/detail/CVE-2023-22474
• PATCHgithub.com/parse-community/parse-server
• WEBgithub.com/parse-community/parse-server/commit/e016d813e083ce6828f9abce245d15b681a224d8
• WEBgithub.com/parse-community/parse-server/security/advisories/GHSA-vm5r-c87r-pf6x