How severe is CVE-2020-24653?

CVE-2020-24653 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2020-24653 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2020-24653?

CVE-2020-24653 affects Expo. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2020-24653?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.

When was CVE-2020-24653 published?

CVE-2020-24653 was published on 2020-08-26 and last updated on 2026-06-17.

CVE-2020-24653

CVE-2020-24653 is a critical-severity vulnerability in Expo with a CVSS 3.x base score of 9.8. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low.

Key facts

Severity: Critical (CVSS 3.x base score 9.8)
CVSS v2: 6.8
EPSS exploit prediction: 1% (64th percentile)
Actively exploited: Not listed in CISA KEV
Affected product: Expo
Published: 2020-08-26
Last modified: 2026-06-17

Description

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

Frequently asked questions

What is 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.
How severe is CVE-2020-24653?: CVE-2020-24653 has a CVSS 3.x base score of 9.8, rated critical severity. It is exploitable over network with low attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2020-24653 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (64th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2020-24653?: CVE-2020-24653 affects Expo. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2020-24653?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its critical severity, prioritise patching exposed systems.
When was CVE-2020-24653 published?: CVE-2020-24653 was published on 2020-08-26 and last updated on 2026-06-17.

References

https://github.com/expo/expo/pull/9264

Affected products (1)

cpe:2.3:a:expo:expo:*:*:*:*:*:iphone_os:*:*