What is CVE-2020-24653?

CVE-2020-24653 is a critical-severity vulnerability in Expo. CVSS score: 9.8/10. Published 2020-08-26.

How severe is CVE-2020-24653?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Vulnerability in Expo

CVE-2020-24653

secure-store in Expo through 2.16.1 on iOS provides the insecure kSecAttrAccessibleAlwaysThisDeviceOnly policy when WHEN_UNLOCKED_THIS_DEVICE_ONLY is used.

Published 2020-08-26 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.012 (66.3th percentile), scored 2026-10-05.

Low probability of exploitation in the next 30 days, but still tracked. 66th percentile — 66.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.012 · newest: 0.012 · change: 0.000

Affected products

Expo

References

github.com/expo/expo/pull/9264 (Patch, Third Party Advisory)

Frequently asked questions

What is CVE-2020-24653?: CVE-2020-24653 is a critical-severity vulnerability in Expo. CVSS score: 9.8/10. Published 2020-08-26.
How severe is CVE-2020-24653?: Critical severity. CVSS v3 base score is 9.8 out of 10.