CVE-2023-25933

Name: CVE-2023-25933
Creator: NVD / NIST
Published: 2023-05-18T22:15:09.75+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 0.89%

Last modified Jun 17, 2026

CVE-2023-25933 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A type confusion bug in TypedArray prior to commit e6ed9c1a4b02dc219de1648f44cd808a56171b81 could have been used by a malicious attacker to execute arbitrary code via untrusted JavaScript. Note that this is only exploitable in cases where Hermes is used to execute untrusted JavaScript. EPSS estimates a 0.89% chance of exploitation in the next 30 days.

Description

A type confusion bug in TypedArray prior to commit e6ed9c1a4b02dc219de1648f44cd808a56171b81 could have been used by a malicious attacker to execute arbitrary code via untrusted JavaScript. Note that this is only exploitable in cases where Hermes is used to execute untrusted JavaScript. Hence, most React Native applications are not affected.

Metrics

CVSS 3.1

9.8/10

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

EPSS Probability

0.89%

54.8th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

Vendor	Product	Versions
Facebook	Hermes	All versions

References

https://github.com/facebook/hermes/commit/e6ed9c1a4b02dc219de1648f44cd808a56171b81Patch
https://www.facebook.com/security/advisories/cve-2023-25933Patch, Vendor Advisory
https://github.com/facebook/hermes/commit/e6ed9c1a4b02dc219de1648f44cd808a56171b81Patch
https://www.facebook.com/security/advisories/cve-2023-25933Patch, Vendor Advisory

Timeline

Published: May 18, 2023
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2023-25933?

How severe is CVE-2023-25933?

CVE-2023-25933 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 0.89% probability of exploitation in the next 30 days.

How do I fix CVE-2023-25933?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2023-25933?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST