Executive Summary

Name CVE-2021-22538 First vendor Publication 2021-03-31
Vendor Cve Last vendor Modification 2021-04-06

Security-Database Scoring CVSS v3

Cvss vector : CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Overall CVSS Score 8.8
Base Score 8.8 Environmental Score 8.8
impact SubScore 5.9 Temporal Score 8.8
Exploitabality Sub Score 2.8
Attack Vector Network Attack Complexity Low
Privileges Required Low User Interaction None
Scope Unchanged Confidentiality Impact High
Integrity Impact High Availability Impact High
Calculate full CVSS 3.0 Vectors scores

Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:L/Au:S/C:P/I:P/A:P)
Cvss Base Score 6.5 Attack Range Network
Cvss Impact Score 6.4 Attack Complexity Low
Cvss Expoit Score 8 Authentication Requires single instance
Calculate full CVSS 2.0 Vectors scores


A privilege escalation vulnerability impacting the Google Exposure Notification Verification Server (versions prior to 0.23.1), allows an attacker who (1) has UserWrite permissions and (2) is using a carefully crafted request or malicious proxy, to create another user with higher privileges than their own. This occurs due to insufficient checks on the allowed set of permissions. The new user creation event would be captured in the Event Log.

Original Source

Url : http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-22538

CWE : Common Weakness Enumeration

% Id Name
100 % CWE-276 Incorrect Default Permissions

CPE : Common Platform Enumeration

Application 1

Sources (Detail)

Source Url
CONFIRM https://github.com/google/exposure-notifications-verification-server/commit/e...

Alert History

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Date Informations
2021-05-04 14:08:46
  • Multiple Updates
2021-04-22 03:13:44
  • Multiple Updates
2021-04-06 21:23:19
  • Multiple Updates
2021-04-01 09:23:16
  • Multiple Updates
2021-04-01 05:22:58
  • First insertion