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Case File

CVE-2021-22538

MEDIUM · CVSS 6.3 EPSS 0.72% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2021-03-31 · Last synced 2026-08-04

CyberRota Analysis

This is a medium severity vulnerability with a CVSS score of 6.3. Public exploit code or proof-of-concept references have been detected in its references.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2021-22538
Severity
MEDIUM
CVSS
6.3
EPSS
0.72%

Original NVD Description

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.

Related CVEs

Other vulnerabilities affecting the same vendor(s)