Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2023-28131

42
FAUCET Score

CVE-2023-28131 is a critical vulnerability affecting the Expo framework, specifically applications utilizing the "Expo AuthSession Redirect Proxy" for social sign-in. This flaw allows attackers to compromise user accounts and steal credentials through a malicious link, leading to complete confidentiality, integrity, and availability compromise. Rated 9.6 CRITICAL (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H), it requires user interaction (clicking a link) but has low attack complexity. While not listed in KEV or having public exploit code, it has garnered significant community discussion and media coverage, indicating awareness and potential for future exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
>= 45.0.0, < 48.0.0CPE matchmatch criteria
cpe:2.3:a:expo:expo_software_development_kit:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

9.6CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
REQUIRED
Scope
CHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
6.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
22.99%
Probability of exploitation in next 30 days
EPSS Percentile
97.5%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
This CVE's current EPSS score of 0.2299 is in the 98th percentile among its peer group of 834 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.8 Bluesky, 0.5 Mastodon, and 1.2 GitHub mentions.

Media Mentions

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.1 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (1)

npmpatch availablevia ghsa
Product: expoFixed in: 48.0.0

Vendor Advisories (1)

npmGHSA-wr5g-q49g-548wcritical

Expo SDK has an OAuth vulnerability

Apr 24, 2023

References

blog.expo.dev / security-advisory-for-developers-using-authsessions-useproxy-options-and-auth-expo-io-e470fe9346df
MitigationThird Party Advisory
darkreading.com / endpoint/oauth-flaw-in-expo-platform-affects-hundreds-of-third-party-sites-apps