# CVE-2023-28131: Expo SDK OAuth vulnerability in AuthSession redirect proxy

Source: https://junglewise.ai/threats/cve-2023-28131-expo-sdk-oauth-vulnerability-in-authsession-redirect-proxy  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2023-04-24. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2023-28131 · Severity: low · CVSS 3.1 · Published 2023-04-24

Expo SDK, a popular framework for building mobile and web applications, contains an OAuth vulnerability in its AuthSession redirect proxy used for social sign-in. An attacker can hijack user accounts and steal login credentials by tricking users into clicking a malicious link, potentially affecting hundreds of third-party apps and websites built on the platform. This represents a significant risk to end-user account security and application integrity.

Vendors: [npm](https://junglewise.ai/threats/vendors/npm).

## Quick answers

**Is CVE-2023-28131 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2023-28131 being exploited in the wild.

**How severe is CVE-2023-28131?** Low severity, with a CVSS score of 3.1, published 24 April 2023.

**Which products and versions are affected?** expo (npm) SEMVER:introduced=0,fixed=48.0.0.

**Is there a fix for CVE-2023-28131?** Yes. expo (npm): upgrade to 48.0.0 or later. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2023-28131 attacked?** It is attacked over the network.

**Am I affected by CVE-2023-28131?** Check whether you run expo (npm) at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- expo (npm): upgrade to 48.0.0 or later

  ```sh
  npm install expo@48.0.0
  ```


## Technical details

The vulnerability is an OAuth credential theft issue (CWE-522: Insufficient logging) in the Expo framework's AuthSession redirect proxy mechanism. When applications configure the "Expo AuthSession Redirect Proxy" for social sign-in, an attacker can craft a malicious link that, when clicked by a victim, intercepts and steals OAuth credentials or takes over the user's account. The attack requires user interaction (clicking a link) but has no authentication or privilege prerequisites and is delivered via network-accessible vectors (email, text, attacker-controlled websites). All versions prior to 48.0.0 are affected; version 48.0.0 and later include a fix.

## Affected products

- Expo SDK before 48.0.0

## Identifiers

- CVE-2023-28131
- GHSA-wr5g-q49g-548w

## Timeline

- 2023-04-24: disclosed

## References

- [https://blog.expo.dev/security-advisory-for-developers-using-authsessions-useproxy-options-and-auth-expo-io-e470fe9346df](https://blog.expo.dev/security-advisory-for-developers-using-authsessions-useproxy-options-and-auth-expo-io-e470fe9346df)

## Related threats

- [Expo secure-store iOS incorrect security attribute application](https://junglewise.ai/threats/cve-2020-24653-expo-secure-store-ios-incorrect-security-attribute-application)