What is CVE-2023-21237?

CVE-2023-21237 is a medium-severity vulnerability in Google Android, classified under Information Disclosure. CVSS score: 5.5/10. Published 2023-06-28.

How severe is CVE-2023-21237?

Medium severity. CVSS v3 base score is 5.5 out of 10.

Is CVE-2023-21237 known to be exploited?

Yes. CVE-2023-21237 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-03-05), indicating it is being actively exploited. 1 public proof-of-concept repositories are indexed.

Information disclosure in Google Android

CVE-2023-21237

In applyRemoteView of NotificationContentInflater.java, there is a possible way to hide foreground service notification due to misleading or insufficient UI. This could lead to local information disclosure with no additional execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android-13Android ID: A-251586912

Vulnerability class: Information Disclosure

Published 2023-06-28 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.5 (Medium). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N.

EPSS exploit prediction

EPSS: 0.003 (17.2th percentile), scored 2026-10-19.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 17th percentile — 17.2% 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

Google Android — versions 13.0
Android — versions Android-13

Weakness classification (CWE)

CWE-200 — Information Disclosure

CISA KEV (Known Exploited Vulnerabilities)

This CVE is on the CISA KEV catalog, added on 2024-03-05. CISA KEV inclusion means CISA has confirmed in-the-wild exploitation; US federal agencies are required to remediate within a published due date.

BOD 22-01 due date: 2024-03-26.

Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable.

Public proof-of-concept exploits

fkie-cad/nvd-json-data-feeds

References

source.android.com/security/bulletin/pixel/2023-06-01 (Vendor Advisory)
134c704f-9b21-4f2e-91b3-4a467353bcc0 (Third Party Advisory, US Government Resource)

Frequently asked questions

What is CVE-2023-21237?: CVE-2023-21237 is a medium-severity vulnerability in Google Android, classified under Information Disclosure. CVSS score: 5.5/10. Published 2023-06-28.
How severe is CVE-2023-21237?: Medium severity. CVSS v3 base score is 5.5 out of 10.
Is CVE-2023-21237 known to be exploited?: Yes. CVE-2023-21237 is listed in the CISA Known Exploited Vulnerabilities catalog (added 2024-03-05), indicating it is being actively exploited. 1 public proof-of-concept repositories are indexed.