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CVE-2020-24653

28
FAUCET Score

CVE-2020-24653 describes a critical vulnerability in Expo's secure-store on iOS versions through 2.16.1. It improperly uses the insecure kSecAttrAccessibleAlwaysThisDeviceOnly policy when WHEN_UNLOCKED_THIS_DEVICE_ONLY is specified, compromising data security. With a CVSS score of 9.8 (CRITICAL), this vulnerability is easily exploitable over a network with low attack complexity, potentially leading to complete compromise of confidentiality, integrity, and availability. There is currently no evidence of active exploitation, public exploit code, or significant community discussion surrounding this CVE.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.16.1CPE matchmatch criteria
cpe:2.3:a:expo:expo:*:*:*:*:*:iphone_os:*:*

CVSS Data

CVSS version used by this source: 3.1

9.8CRITICAL

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.1

Exploit Intelligence

EPSS Score
1.17%
Probability of exploitation in next 30 days
EPSS Percentile
64.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-26
Model: v2026.06.15
This CVE's current EPSS score of 0.0117 is in the 50th percentile among its peer group of 36,833 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

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

Remediation

Patch Available

Vendor Patches (2)

github_advisorypatch availablevia nvd_reference
View patch
npmpatch availablevia ghsa
Product: expoFixed in: 9.1.0

Vendor Advisories (1)

npmGHSA-rwx9-wqj8-vr77medium

Expo on iOS is insecure due incorrect security attribute application

May 24, 2022

References

github.com / expo/expo/pull/9264
PatchThird Party Advisory