CVE-2023-28131: A vulnerability in the expo.io framework allows an attacker to take over accounts and steal credentials on an

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CRITICAL 9.6UPGRADE

CVE-2023-28131 is a critical-severity flaw (CVSS 9.6) affecting expo software development kit. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

A vulnerability in the expo.io framework allows an attacker to take over accounts and steal credentials on an application/website that configured the "Expo AuthSession Redirect Proxy" for social sign-in. This can be achieved once a victim clicks a malicious link. The link itself may be sent to the victim in various ways (including email, text message, an attacker-controlled website, etc).

Why this priority

Critical severity
EPSS top 2%: very likely to be exploited

A fixed release or distro patch exists.

Risk facts

CVSS score	9.6 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	23.2% (top 2%)
CISA exploited list	No
Weakness	CWE-522
Published	2023-04-24
Last modified	2026-06-17

Publisher (CNA): Check Point Software Technologies Ltd. · Vendor: expo

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2023-04-24 05:15 UTCPublished CVE record published
2026-06-17 05:46 UTCUpdated Record last modified

expo expo software development kit UPGRADE

Affected: >= 45.0.0 and < 48.0.0

Fixed in: 48.0.0

Safe to downgrade to: a release before 45.0.0

1. Check installed version

apt-cache policy expo-software-development-kit || rpm -q expo-software-development-kit || expo-software-development-kit --version

2. UPGRADE to 48.0.0 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade expo-software-development-kit

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade expo-software-development-kit

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

3. If no update is available yet, DOWNGRADE to a release before 45.0.0 (Debian / Ubuntu)

apt-cache madison expo-software-development-kit sudo apt install expo-software-development-kit=<VERSION_BEFORE_45.0.0> sudo apt-mark hold expo-software-development-kit

3. If no update is available yet, DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list expo-software-development-kit sudo dnf downgrade expo-software-development-kit-<VERSION_BEFORE_45.0.0> sudo dnf versionlock add expo-software-development-kit

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2023-28131?

expo software development kit: upgrade to 48.0.0. Exact commands for each OS are on this page.

Is CVE-2023-28131 being exploited?

CVE-2023-28131 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2023-28131 affect?

CVE-2023-28131 affects expo software development kit. Severity is critical (CVSS 9.6). A vulnerability in the expo.io framework allows an attacker to take over accounts and steal credentials on an application/website that configured the "Expo AuthSession Redirect Proxy" for social sign-in. This can be achieved once a victim c

How urgent is CVE-2023-28131?

Priority 58/100. Critical severity; EPSS top 2%: very likely to be exploited

References

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