What is CVE-2023-20921?

CVE-2023-20921 is a high-severity vulnerability in Google Android, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.3/10. Published 2023-01-26.

How severe is CVE-2023-20921?

High severity. CVSS v3 base score is 7.3 out of 10.

Is CVE-2023-20921 known to be exploited?

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

Vulnerability in Google Android

CVE-2023-20921

In onPackageRemoved of AccessibilityManagerService.java, there is a possibility to automatically grant accessibility services due to a logic error in the code. This could lead to local escalation of privilege with no additional execution privileges needed. User interaction is needed for exploitation.Product: AndroidVersions: Android-10 Android-11 Android-12 Android-12L Android-13Android ID: A-243378132

EPSS: 0.003 (19.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.

Affected products

Google Android — versions 10.0, 11.0, 12.0
N/a Android — versions Android-10 Android-11 Android-12 Android-12L Android-13

Weakness classification (CWE)

CWE-670 — Always-Incorrect Control Flow Implementation

Public proof-of-concept exploits

References

security@android.com (Vendor Advisory)

Frequently asked questions

What is CVE-2023-20921?: CVE-2023-20921 is a high-severity vulnerability in Google Android, classified under Always-Incorrect Control Flow Implementation. CVSS score: 7.3/10. Published 2023-01-26.
How severe is CVE-2023-20921?: High severity. CVSS v3 base score is 7.3 out of 10.
Is CVE-2023-20921 known to be exploited?: 5 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.