What is CVE-2021-4438?

CVE-2021-4438 is a medium-severity vulnerability in Kyivstar React Native Sms User Consent, classified under CWE-926. CVSS score: 5.3/10. Published 2024-04-07.

How severe is CVE-2021-4438?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Is CVE-2021-4438 known to be exploited?

2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Vulnerability in Kyivstar React Native Sms User Consent

CVE-2021-4438

A vulnerability, which was classified as critical, has been found in kyivstarteam react-native-sms-user-consent up to 1.1.4 on Android. Affected by this issue is the function registerReceiver of the file android/src/main/java/ua/kyivstar/reactnativesmsuserconsent/SmsUserConsentModule.kt. The manipulation leads to improper export of android application components. Attacking locally is a requirement. Upgrading to version 1.1.5 is able to address this issue. The name of the patch is 5423dcb0cd3e4d573b5520a71fa08aa279e4c3c7. It is recommended to upgrade the affected component. The identifier of this vulnerability is VDB-259508.

Published 2024-04-07 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

EPSS: 0.003 (15.9th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 16th percentile — 15.9% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: 0.000

Affected products

Kyivstar React Native Sms User Consent
Kyivstarteam React-Native-Sms-User-Consent — versions 1.1.0, 1.1.1, 1.1.2

Weakness classification (CWE)

CWE-926

Public proof-of-concept exploits

References

vuldb.com/ (technical-description, VDB Entry, Third Party Advisory, vdb-entry)
vuldb.com/ (signature, permissions-required, VDB Entry, Third Party Advisory)
github.com/kyivstarteam/react-native-sms-user-consent/pull/4 (issue-tracking, Patch)
github.com/kyivstarteam/react-native-sms-user-consent/commit/5423dcb0cd3e4d573b… (Patch, patch)
github.com/kyivstarteam/react-native-sms-user-consent/releases/tag/1.1.5 (Release Notes, patch)

Frequently asked questions

What is CVE-2021-4438?: CVE-2021-4438 is a medium-severity vulnerability in Kyivstar React Native Sms User Consent, classified under CWE-926. CVSS score: 5.3/10. Published 2024-04-07.
How severe is CVE-2021-4438?: Medium severity. CVSS v3 base score is 5.3 out of 10.
Is CVE-2021-4438 known to be exploited?: 2 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.