Security readout for executives and security teams
Plain-English summary
This Android 13 flaw can let a local attacker hide a foreground service notification, reducing the user’s visibility into app activity. The stated impact is local information disclosure. It matters more than a typical medium issue because CISA lists it in KEV, meaning exploitation has been observed.
Executive priority
Treat this as a high-priority mobile patching item because it is in CISA KEV. The business risk is stealthy local information disclosure on Android 13 devices, not broad remote compromise based on the provided evidence.
Technical view
The issue is in applyRemoteView in NotificationContentInflater.java. Misleading or insufficient UI can allow hiding a foreground service notification. CVSS is 6.2: local attack vector, low complexity, no privileges, no user interaction, high confidentiality impact, no integrity or availability impact.
Likely exposure
Exposure is limited to Android 13 according to the CVE record. Organizations with Android 13 devices lacking relevant June 2023 Android or Pixel security guidance may be exposed. No other affected products are identified in the provided sources.
Exploitation context
CISA KEV status supports active exploitation. The public description indicates local exploitation with no privileges and no user interaction. The sources do not provide exploit details, affected app scenarios, or evidence of remote exploitation.
Researcher notes
Evidence is sparse. The CVE names NotificationContentInflater.java and applyRemoteView, with CWE-200 and Android ID A-251586912. The provided sources do not include exploit mechanics, proof-of-concept code, or detailed remediation notes beyond vendor bulletin references.
Mitigation direction
- Prioritize Android 13 devices in mobile vulnerability management.
- Review Android and Pixel June 2023 vendor guidance for patched builds.
- Apply available vendor security updates to affected Android 13 devices.
- Track CISA KEV remediation expectations for managed devices.
- Escalate unsupported Android 13 devices for replacement or isolation review.
Validation and detection
- Inventory Android 13 devices across managed and BYOD fleets.
- Check each device’s installed Android security patch level.
- Confirm CVE-2023-21237 is covered by vendor update status.
- Review MDM compliance reports for overdue Android security updates.
- Document exceptions where vendor patch status is unavailable.
Public sources used
Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.
Conservative CVE-to-ATT&CK context
These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.
ATT&CK lookup starting points
Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.
CWE-200: Information exposure and cloud metadata lookup
Information exposure and SSRF weaknesses can make discovery, cloud metadata, and credential material review relevant. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.
Open ATT&CK lookupCVE-2023-21237 mapping review
Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.
Open ATT&CK lookup- Severity
- Medium
- CVSS
- 6.2 (3.1)
- Known Exploited
- Yes
- Published
Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
CNA and ADP enrichment extracted from CVE v5
These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.
CISA KEV status
CVSS vector scores
1 official scoreWe collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.
CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N2.53.6Primary CVE scoreVulnerability scoring details
Base CVSS 3.1 score
6.2MediumVector: CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source materials
- CVE List V5 sourceCVE List V5
- https://source.android.com/security/bulletin/pixel/2023-06-01CVE reference
- https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2023-21237CVE reference · government-resource
Products and packages named in the record
CWE details
CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.
Exposure of Sensitive Information to an Unauthorized Actor
Exposure of Sensitive Information to an Unauthorized Actor represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.